fullscreen void setup()
{background(400,400,400);
size(500,300);
frameRate(30);
}
void draw(){
for (int x=0; x<width+40; x=x+10);
{
for (int y=0; y<height+40; y=y+10)
{
strokeWeight(10);
}
}
float a = random (0,1000);
float b = random (0,1000);
float c = random (0,2);
stroke(#999999);
strokeWeight(c);
line(mouseX+a,mouseY+b,width-mouseX-b,height-mouseY-a);
}