Animate
Remember that using the background() function clears the screen each frame, turning a drawing program into an animation.
void setup ()
{
size(640,480);
background(255);
stroke(0);
fill(0);
}
void draw()
{
background(255);
ellipse(mouseX,mouseY,6,6);
}
// rubber band
void setup ()
{
size(640,480);
background(255);
stroke(0);
fill(0);
}
void draw()
{
background(255);
line(mouseX,mouseY,0,0);
line(mouseX,mouseY,640,0);
line(mouseX,mouseY,640,480);
line(mouseX,mouseY,0,480);
}
// crosshairs
void setup ()
{
size(640,480);
background(0);
stroke(255,0,0);
noFill();
}
void draw()
{
background(0);
line(0,mouseY,640,mouseY);
line(mouseX,0,mouseX,480);
ellipse(mouseX,mouseY,50,50);
}