processing -beginshape

void setup ()


{

size (400, 400);
background (250);



}

void draw ()

{

fill(250,100);
strokeWeight(8);

int koorBirX=mouseX;
int koorBirY=mouseY;

beginShape();
vertex(koorBirX, koorBirY);
vertex(koorBirX+20, koorBirY);
vertex(koorBirX, koorBirY+20);
vertex(koorBirX, koorBirY+20);
vertex(koorBirX+40, koorBirY+40);
vertex(koorBirX, koorBirY+40);
endShape(CLOSE);

}