size(400, 400);
background(0);
stroke(255, 0, 0);
smooth();
rectMode(CENTER);

int shapeSize = 400;
int squareSize = 200;
int kindOfShape = 0;

while(squareSize > 5){

if(kindOfShape == 0){

fill(240, 80, 125);
ellipse(50,380,shapeSize,shapeSize);
kindOfShape = 1;

fill(255,134,197);
ellipse(50,20,shapeSize,shapeSize);

fill(255,134,197);
ellipse(350,380,shapeSize,shapeSize);

fill(240,80,125);
ellipse(350, 20,shapeSize,shapeSize);

}else{

fill(250,80, 255);
rect(200,200,squareSize,squareSize);
kindOfShape = 0;

}

shapeSize = shapeSize - 1;
squareSize = squareSize - 7;

}