// Move the mouse to see triangles following the mouse
 
void setup(){
size(400,400);
}
void draw() 
{ 
  background(204); 
  int a=mouseX-((mouseX-pmouseX)*4);
  int b=mouseY-((mouseY-pmouseY)*4);
  fill(125);
  triangle(a,b,a, b+15,a+10,b+12);
  int x=mouseX-((mouseX-pmouseX)*2);
  int y=mouseY-((mouseY-pmouseY)*2);
  fill(200);
  triangle(x,y,x, y+15,x+10,y+12);
  fill(255);
  triangle(pmouseX,pmouseY, pmouseX, pmouseY+15,pmouseX+10,pmouseY+12);
}