parte4

int tam =50;

float posX,posY,velX,velY;

​

void setup(){

size(400,300);

posX=width/2;

posY=height/2;

velX=random(1,10);

velY=random(1,10);

​

}

​

void draw(){

background(0);

posX=posX+velX;

posY=posY+velY;

​

​

​

if(posX-tam/2<0||posX+tam/2>width){

  velX=-velX;

}

​

if(posY-tam/2<0||posY+tam/2>height){

  velY=-velY;

}

​

​

​

if(posX>=width/2){

  rect(posX-tam/2,posY-tam/2,tam,tam);

} else 

{ellipse(posX,posY,tam,tam);

}

​

if(posY<=height/2){

  fill(0,255,0);

} else {

  fill(255,0,0);

}

​

}

​

​

​

​

​