diff --git a/codeeditor-app/elements/code-editor/code-editor.ts b/codeeditor-app/elements/code-editor/code-editor.ts
index 6da86e9..21dce17 100644
--- a/codeeditor-app/elements/code-editor/code-editor.ts
+++ b/codeeditor-app/elements/code-editor/code-editor.ts
@@ -3,6 +3,8 @@ import './code-editor.less';
 import * as monaco from 'monaco-editor';
 import { OutputFrame } from "../output-frame/output-frame";
 import initScript from './injects/editor-init.txt';
+import spiralBoxesSolutionScript from './injects/spiral-boxes-solution.txt';
+import { debounceManager } from "../../../shared/ensure-debounce";
 
 export class CodeEditor extends BaseElement {
 
@@ -90,7 +92,15 @@ export class CodeEditor extends BaseElement {
                             label: 'rand',
                             detail: "gets a random number between two numbers",
                             kind: monaco.languages.CompletionItemKind.Function,
-                            insertText: 'rand(${1:from}, ${1:to})',
+                            insertText: 'rand(${1:from}, ${2:to})',
+                            range: <any>null,
+                            insertTextRules: monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet
+                        },
+                        {
+                            label: 'spiralBoxesSolutionSnippet',
+                            detail: "inserts solution of spiral boxes",
+                            kind: monaco.languages.CompletionItemKind.Function,
+                            insertText: spiralBoxesSolutionScript,
                             range: <any>null,
                             insertTextRules: monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet
                         }
@@ -100,12 +110,16 @@ export class CodeEditor extends BaseElement {
         });
 
 
+        var debounce = debounceManager(1000);
         editor.onDidChangeModelContent((e) => {
             this.input = editor.getValue();
-            this.outputFrame.setScript(this.input);
+            debounce.ensureDebounce(() => {
+                this.outputFrame.setScript(this.input);
+            });
         });
 
         this.waitFor(this.outputFrame, () => {
+            console.log("setting script");
             this.outputFrame.setScript(this.input);
         });
 
diff --git a/codeeditor-app/elements/code-editor/injects/editor-init.txt b/codeeditor-app/elements/code-editor/injects/editor-init.txt
index 2fd0dfe..b2fb87d 100644
--- a/codeeditor-app/elements/code-editor/injects/editor-init.txt
+++ b/codeeditor-app/elements/code-editor/injects/editor-init.txt
@@ -1,20 +1,4 @@
-const myDiv = document.createElement("div");
-myDiv.innerText = "hello moto";
-
-document.body.appendChild(myDiv);
-
-
-let i = 0;
-
-while (i < 10) {
-    console.log("hello " + i);
-    i++;
-}
-
-const obj = { hello: true, moto: "enabled" };
-
-console.log(obj);
-
-rect(10, 10, 100, 100);
-rect(rand(20, 70), rand(20, 70), 100, 100);
-rect(80, 80, 100, 100);
\ No newline at end of file
+box(10, 10, 20, 20);
+box(50, rand(100, 200), 20, 20);
+box(160, 50, 20, 20);
+box(center(), center(), 20, 20);
\ No newline at end of file
diff --git a/codeeditor-app/elements/code-editor/injects/spiral-boxes-solution.txt b/codeeditor-app/elements/code-editor/injects/spiral-boxes-solution.txt
new file mode 100644
index 0000000..c310f52
--- /dev/null
+++ b/codeeditor-app/elements/code-editor/injects/spiral-boxes-solution.txt
@@ -0,0 +1,47 @@
+const boxSize = 40;
+const stepSize = boxSize + boxSize / 4;
+let x = center() - boxSize / 2;
+let y = center() - boxSize / 2;
+let turns = 0;
+let currentDirection = 0;
+let currentStep = 1;
+let stepsInCurrentDirection = 1;
+
+while (!isOutsizeCanvas()) {
+    box(x, y, boxSize, boxSize);
+    moveAccordingToDirection();
+    setNextStepAndDirection();
+}
+
+function isOutsizeCanvas() {
+    return (x + stepSize) > width() ||
+           (y + stepSize) > height();
+}
+
+function moveAccordingToDirection() {
+    switch (currentDirection) {
+        case 0:
+            x += stepSize;
+            break;
+        case 1:
+            y -= stepSize;
+            break;
+        case 2:
+            x -= stepSize;
+            break;
+        case 3:
+            y += stepSize;
+            break;
+    }
+}
+
+function setNextStepAndDirection() {
+    if (currentStep % stepsInCurrentDirection == 0) {
+        currentDirection = (currentDirection + 1) % 4;
+        turns++;
+        if (turns % 2 == 0) {
+            stepsInCurrentDirection++;
+        }
+    }
+    currentStep++;
+}
\ No newline at end of file
diff --git a/codeeditor-app/elements/output-frame/output-frame.less b/codeeditor-app/elements/output-frame/output-frame.less
index c7e9f7e..1ac7c2b 100644
--- a/codeeditor-app/elements/output-frame/output-frame.less
+++ b/codeeditor-app/elements/output-frame/output-frame.less
@@ -2,6 +2,7 @@ output-frame {
     width: 100%;
     height: 100%;
     display: block;
+    background-color: #f0f0f0;
 }
 
 output-frame > iframe {
@@ -9,4 +10,12 @@ output-frame > iframe {
     width: 100%;
     height: 100%;
     border: none;
+}
+
+
+
+@media (prefers-color-scheme: dark) {
+    output-frame {
+        background-color: #272727;
+    }
 }
\ No newline at end of file
diff --git a/codeeditor-app/elements/output-frame/output-frame.ts b/codeeditor-app/elements/output-frame/output-frame.ts
index 0b42933..6580019 100644
--- a/codeeditor-app/elements/output-frame/output-frame.ts
+++ b/codeeditor-app/elements/output-frame/output-frame.ts
@@ -1,6 +1,5 @@
 import { BaseElement } from "../../../shared/_base";
 import './output-frame.less';
-import { NotificationBubbles } from "../notification-bubbles/notification-bubbles";
 import { GetOutputFrameUrl } from "../../../shared/url-helpers";
 import { GetNotificationBubbles } from "../../../shared/getdom";
 import { postMessage } from "../../../shared/post-message";
diff --git a/outputframe-app/app.less b/outputframe-app/app.less
index cd37aad..239385c 100644
--- a/outputframe-app/app.less
+++ b/outputframe-app/app.less
@@ -15,7 +15,6 @@ body {
     background-color: #f0f0f0;
 }
 
-
 @media (prefers-color-scheme: dark) {
     body {
         background-color: #272727;
diff --git a/outputframe-app/boot.ts b/outputframe-app/boot.ts
index 3a1696a..4f6b9f2 100644
--- a/outputframe-app/boot.ts
+++ b/outputframe-app/boot.ts
@@ -6,7 +6,7 @@ import { createScript } from '../shared/create-script';
 import { messageListener } from '../shared/message-listener';
 import { postMessage, postResponseMessage } from '../shared/post-message';
 import { RenderCanvas } from './elements/render-canvas/render-canvas';
-import { getCenter, getHeight, getRandom, getWidth, rect } from './injects/dom-helpers';
+import { getCenter, getHeight, getRandom, getWidth, rect, box } from './injects/dom-helpers';
 
 
 window.customElements.define('render-canvas', RenderCanvas);
@@ -29,7 +29,7 @@ setOnErrorListener((type, value) => {
 //@ts-ignore
 window.rect = rect;
 //@ts-ignore
-window.box = rect;
+window.box = box;
 //@ts-ignore
 window.width = getWidth;
 //@ts-ignore
diff --git a/outputframe-app/elements/render-canvas/render-canvas.ts b/outputframe-app/elements/render-canvas/render-canvas.ts
index d41a646..65dcb81 100644
--- a/outputframe-app/elements/render-canvas/render-canvas.ts
+++ b/outputframe-app/elements/render-canvas/render-canvas.ts
@@ -8,9 +8,11 @@ export class RenderCanvas extends BaseElement {
     public height: number = 0;
     public units = {
         width: 400,
-        heigt: 400
+        height: 400
     }
-    
+    public drawCount: number = 0;
+    public drawQueue: { x: number, y: number }[][] = [];
+
     public prefersDarkScheme = window.matchMedia("(prefers-color-scheme: dark)");
 
     onInit(): void {
@@ -28,8 +30,8 @@ export class RenderCanvas extends BaseElement {
 
     private handleCanvasResize() {
         if (this.parentElement && this.canvas) {
-            this.width = this.parentElement.clientWidth - 20;
-            this.height = this.parentElement.clientHeight - 20;
+            this.width = Math.floor(this.parentElement.clientWidth - 20);
+            this.height = Math.floor(this.parentElement.clientHeight - 20);
 
             var smallest = Math.min(this.width, this.height);
 
@@ -43,7 +45,7 @@ export class RenderCanvas extends BaseElement {
     drawPoly(points: { x: number, y: number }[]) {
         if (this.ctx && this.canvas) {
             this.canvas.style.display = "block";
-            this.ctx.fillStyle = "rgba(0,0,0,0)";
+            this.ctx.fillStyle = this.getColor(true);
             this.ctx.strokeStyle = this.getColor();
             this.ctx.beginPath();
 
@@ -64,20 +66,96 @@ export class RenderCanvas extends BaseElement {
         }
     }
 
-    getColor() {
-        return this.prefersDarkScheme.matches ? 'rgba(255,255,255,1)' : 'rgba(0,0,0,1)';
+    centerOf(points: { x: number, y: number }[]) {
+        var x = 0,
+            y = 0,
+            i,
+            j,
+            f,
+            point1,
+            point2;
+
+        for (i = 0, j = points.length - 1; i < points.length; j = i, i++) {
+            point1 = points[i];
+            point2 = points[j];
+            f = point1.x * point2.y - point2.x * point1.y;
+            x += (point1.x + point2.x) * f;
+            y += (point1.y + point2.y) * f;
+        }
+
+        f = this.areaOf(points) * 6;
+
+        return { x: x / f, y: y / f };
+    };
+
+    areaOf(points: { x: number, y: number }[]) {
+        var area = 0,
+            i,
+            j,
+            point1,
+            point2;
+
+        for (i = 0, j = points.length - 1; i < points.length; j = i, i++) {
+            point1 = points[i];
+            point2 = points[j];
+            area += point1.x * point2.y;
+            area -= point1.y * point2.x;
+        }
+        area /= 2;
+
+        return area;
+    };
+
+    executeDrawQueue() {
+        let prevCenter: { x: number, y: number } | null = null;
+        for (let i = 0; i < this.drawQueue.length; i++) {
+            const points = this.drawQueue[i];
+
+            if (prevCenter != null) {
+                var thisCenter = this.centerOf(points);
+                this.drawPoly([prevCenter, thisCenter]);
+            }
+
+            prevCenter = this.centerOf(points);
+        }
+
+        for (let i = 0; i < this.drawQueue.length; i++) {
+            const points = this.drawQueue[i];
+            this.drawPoly(points);
+            var thisCenter = this.centerOf(points);
+            this.drawText(thisCenter.x, thisCenter.y, (i + 1).toString(), points[1].x - points[0].x);
+        }
+    }
+
+    drawText(x: number, y: number, text: string, size: number = 20) {
+        if (this.ctx && this.canvas) {
+            this.ctx.moveTo(x, y);
+            this.ctx.fillStyle = this.getColor();
+            this.ctx.textAlign = 'center';
+            this.ctx.textBaseline = 'middle';
+            this.ctx.font = "200 " + size + "px Segoe UI";
+            this.ctx.fillText(text, this.unitsToPx(x), this.unitsToPx(y));
+        }
+    }
+
+    getColor(invert: boolean = false) {
+        return (invert ? !this.prefersDarkScheme.matches : this.prefersDarkScheme.matches) ? 'rgba(255,255,255,1)' : 'rgba(44,44,44,1)';
     }
 
     drawRect(x: number, y: number, width: number, height: number) {
         this.drawPoly([{ x: x, y: y }, { x: x + width, y: y }, { x: x + width, y: y + height }, { x: x, y: y + height }]);
     }
 
+    queuePoly(points: { x: number, y: number }[]) {
+        this.drawQueue.push(points);
+    }
+
+    queueRect(x: number, y: number, width: number, height: number) {
+        this.drawQueue.push([{ x: x, y: y }, { x: x + width, y: y }, { x: x + width, y: y + height }, { x: x, y: y + height }]);
+    }
+
     unitsToPx(unitNumber: number) {
         var newPPU = Math.min(this.width, this.height) / this.units.width;
         return unitNumber * newPPU;
     }
-
-    onUpdate(): void {
-        console.log("APP ROOT UPDATE");
-    }
 }
\ No newline at end of file
diff --git a/outputframe-app/injects/dom-helpers.ts b/outputframe-app/injects/dom-helpers.ts
index 58aac7b..3bf7494 100644
--- a/outputframe-app/injects/dom-helpers.ts
+++ b/outputframe-app/injects/dom-helpers.ts
@@ -9,6 +9,11 @@ export function rect(x: number, y: number, width: number, height: number): void
     renderCanvas.drawRect(x, y, width, height);
 }
 
+export function box(x: number, y: number, width: number, height: number): void {
+    var renderCanvas = <RenderCanvas>document.getElementsByTagName("render-canvas")[0];
+    renderCanvas.queueRect(x, y, width, height);
+}
+
 export function getWidth(): number {
     var renderCanvas = <RenderCanvas>document.getElementsByTagName("render-canvas")[0];
     return renderCanvas.units.width;
@@ -16,14 +21,19 @@ export function getWidth(): number {
 
 export function getHeight(): number {
     var renderCanvas = <RenderCanvas>document.getElementsByTagName("render-canvas")[0];
-    return renderCanvas.units.heigt;
+    return renderCanvas.units.height;
 }
 
 export function getCenter(): number {
     var renderCanvas = <RenderCanvas>document.getElementsByTagName("render-canvas")[0];
-    return renderCanvas.units.heigt / 2;
+    return renderCanvas.units.height / 2;
 }
 
 export function getRandom(min: number, max: number): number {
     return Math.floor(Math.random() * (max - min + 1) + min);
+}
+
+export function executeDrawQueue() {
+    var renderCanvas = <RenderCanvas>document.getElementsByTagName("render-canvas")[0];
+    renderCanvas.executeDrawQueue();
 }
\ No newline at end of file
diff --git a/outputframe-app/static/execution-time-error.html b/outputframe-app/static/execution-time-error.html
index 56326b2..a1120f2 100644
--- a/outputframe-app/static/execution-time-error.html
+++ b/outputframe-app/static/execution-time-error.html
@@ -23,6 +23,13 @@
         small {
             font-size: 0.6em;
         }
+
+
+        @media (prefers-color-scheme: dark) {
+            .center {
+                color: white;
+            }
+        }
     </style>
 </head>
 
diff --git a/outputframe-app/static/index.html b/outputframe-app/static/index.html
index 106c903..5ef3cf6 100644
--- a/outputframe-app/static/index.html
+++ b/outputframe-app/static/index.html
@@ -6,7 +6,6 @@
         content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
     <title>output</title>
     <base href="/" />
-    
 </head>
 
 <body>
diff --git a/run-servers.js b/run-servers.js
index a5900b5..9b311ed 100644
--- a/run-servers.js
+++ b/run-servers.js
@@ -2,21 +2,21 @@ const WebpackDevServer = require("webpack-dev-server");
 const webpack = require("webpack");
 
 const codeeditorConfig = require("./webpack.dev.js");
-const outputframeConfig = require("./webpack.dev-outputframe.js");
+const outputframeConfig = require("./webpack.dev.outputframe.js");
 
 const codeeditorCompiler = webpack(codeeditorConfig);
 const outputframeCompiler = webpack(outputframeConfig);
 
 
-const server1 = new WebpackDevServer(codeeditorCompiler, {
+const server1 = new WebpackDevServer({
     hot: true,
     historyApiFallback: true
-})
+}, codeeditorCompiler);
 
-const server2 = new WebpackDevServer(outputframeCompiler, {
+const server2 = new WebpackDevServer({
     hot: true,
     historyApiFallback: true
-})
+}, outputframeCompiler);
 
 server1.listen(8020, "localhost", function() { console.log("server 1 rdy"); })
 server2.listen(8021, "localhost", function() { console.log("server 2 rdy"); })
\ No newline at end of file
diff --git a/shared/create-script.ts b/shared/create-script.ts
index 0eed6df..a75b403 100644
--- a/shared/create-script.ts
+++ b/shared/create-script.ts
@@ -1,7 +1,11 @@
+import { executeDrawQueue } from "../outputframe-app/injects/dom-helpers";
+
 export function createScript(value: string) {
     var script: HTMLScriptElement = document.createElement("script");
     script.setAttribute("async", "");
     script.innerHTML = value;
 
     document.body.appendChild(script);
+
+    executeDrawQueue();
 }
\ No newline at end of file
diff --git a/shared/ensure-debounce.ts b/shared/ensure-debounce.ts
new file mode 100644
index 0000000..fa326dc
--- /dev/null
+++ b/shared/ensure-debounce.ts
@@ -0,0 +1,16 @@
+export function debounceManager(debounceTime: number): { ensureDebounce: (fn: Function) => void } {
+
+    var curHandle: number | null = null;
+
+    return {
+        ensureDebounce: (fn: Function) => {
+            if (curHandle != null) {
+                clearInterval(curHandle);
+                curHandle = null;
+            }
+            curHandle = setTimeout(() => {
+                fn();
+            }, debounceTime);
+        }
+    }
+}
\ No newline at end of file
diff --git a/webpack.dev-outputframe.js b/webpack.dev.outputframe.js
similarity index 100%
rename from webpack.dev-outputframe.js
rename to webpack.dev.outputframe.js