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logo_idea.html
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<!DOCTYPE html>
<html>
<body>
<canvas id="myCanvas" width="300" height="300" style="border:1px solid #c3c3c3;">Your browser does not support the canvas element.</canvas>
<script>
var canvas = document.getElementById("myCanvas");
var context = canvas.getContext("2d");
var n_lines = 7;
var base_angles = [];
var colors = ['#ff0000','#00ff00','#0000ff','#ffff00','#ff00ff','#00ffff','#000000', '#555555', '#999999', '#dddddd'];
var angles = [];
var speeds = [];
var interval_per_line = 2 * Math.PI / n_lines;
var delta = interval_per_line / 4;
var base_x= canvas.width / 2;
var base_y= canvas.height / 2;
var offset_between_lines = 0.1;
var scale = 100;
var step = 1;
var grey = '#999999';
// Init the arrays
for(var i = 0; i < n_lines; i++) {
base_angles[i] = i * interval_per_line;
angles[i] = base_angles[i];
speeds[i] = Math.random();
}
var draw_line = function(angle_1, angle_2, color) {
context.beginPath();
var start_x = Math.sin(angle_1+ offset_between_lines)* scale + base_x;
var start_y = - Math.cos(angle_1+ offset_between_lines)* scale + base_y;
var end_x = Math.sin(angle_2- offset_between_lines)* scale + base_x;
var end_y = - Math.cos(angle_2- offset_between_lines)* scale + base_y;
context.moveTo(start_x,start_y);
context.lineTo(end_x,end_y);
context.strokeStyle = color;
context.stroke();
}
var draw_color_lines = function() {
context.lineCap = 'round';
context.lineWidth = 15;
for(var i = 0; i < n_lines; i++) {
draw_line(angles[i], angles[(i+1) % n_lines], colors[i]);
}
}
var update_one_angle = function(base, speed) {
return base + Math.sin(step * speed / 50)*delta;
}
var update_angles = function() {
for(var i = 0; i < n_lines; i++) {
angles[i] = update_one_angle(base_angles[i], speeds[i]);
}
}
var draw_outer_grey_line = function(angle_1, angle_2) {
context.beginPath();
var start_x = Math.sin(angle_1)*scale + base_x;
var start_y = - Math.cos(angle_1)*scale + base_y;
var end_x = Math.sin(angle_2)* scale + base_x;
var end_y = - Math.cos(angle_2)* scale + base_y;
context.moveTo(start_x,start_y);
context.lineTo(end_x,end_y);
context.strokeStyle = grey;
context.stroke();
}
var update = function() {
update_angles();
context.clearRect(0, 0, canvas.width, canvas.height);
draw_color_lines();
step++;
}
// Start the animation
setInterval(update, 10);
</script>
</body>
</html>