int robots = 5;
int ax, ay, bx, by, cx, cy;


size(1000, 800);

  for(int i=robots; i>0; i=i-1){

    ax=50;
    bx=75;
    cx=100;

    ay=height/10*robots;
    by=height/10*robots - 50;
    cy=height/10*robots;

    triangle(ax, ay, bx, by, cx, cy);
  }