キャンバスで遊び中 - 砂嵐

キャンバス楽しい！

function rand256() {
    return Math.floor(Math.random() * 256);
}
function rand_graycolor() {
    var c = rand256();
    return "rgb(" + c + "," + c + "," + c + ")";
}


var canvas = document.body.appendChild(document.createElement('canvas'));
canvas.width = 320;
canvas.height = 240;

var ctx = canvas.getContext('2d');

for( var y = 0; y < 240; y ++ ) {
	for( var x = 0; x < 320; x ++ ) {
		ctx.fillStyle = rand_graycolor();
		ctx.fillRect(x, y, 1, 1);
	}
}