@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>HTML5 Canvas</title>
+</head>
+<body>
+<canvas id="draw" width="800" height="800"></canvas>
+<script src="day-08.js">
+</script>
+
+<style>
+  html, body {
+    margin:0;
+  }
+</style>
+
+</body>
+</html>
@@ -0,0 +1,49 @@
+const canvas = document.querySelector('#draw');
+const ctx = canvas.getContext('2d');
+
+canvas.width = window.innerWidth;
+canvas.height = window.innerHeight;
+ctx.strokeStyle = '#b51f24';
+ctx.lineJoin = 'round';
+ctx.lineCap = 'round';
+ctx.lineWidth = 50;
+
+let isDrawing = false;
+let lastX = 0;
+let lastY = 0;
+let hue = 0;
+let direction = true;
+
+function draw(e) {
+  if(!isDrawing) return; { // stop when not moused down
+    console.log(e);
+    ctx.strokeStyle = `hsl(${hue}, 100%, 50%)`;
+    ctx.beginPath();
+    ctx.moveTo(lastX, lastY);
+    ctx.lineTo(e.offsetX, e.offsetY);
+    ctx.stroke();
+    [lastX, lastY] = [e.offsetX, e.offsetY];
+
+    hue++;
+    if( hue >= 360) {
+      hue = 0;
+    }
+    if( ctx.lineWidth >= 100 || ctx.lineWidth <= 1) {
+      direction = !direction;
+    }
+    if(direction) {
+      ctx.lineWidth++;
+    } else {
+      ctx.lineWidth--;
+    }
+
+  }
+}
+
+canvas.addEventListener('mousemove', draw);
+canvas.addEventListener('mousedown', (e)=> {
+  isDrawing = true;
+  [lastX, lastY] = [e.offsetX, e.offsetY];
+});
+canvas.addEventListener('mouseup', ()=> isDrawing = false);
+canvas.addEventListener('mouseout', ()=> isDrawing = false);