http://emiliogomariz.net/1pxw/
menu: (from left to right, top to bottom)
hide menu / handler - draggable menu / refresh page
Rainbow set 1/2/3/4/5
RGB set 1/2/3/4/5
BW set 1/2/3/4/5
mousemove pad; x= repeat same 1px width gif / y= changes length of same gif*10
esc= hide menu