int x1 = 0;
int y1 = 50;
int x2 = 50;
int y2 = 0;
int x3 = 100;
int y3 = 50;

triangle(x1,y2, x2, y2, x3,y3);
//for(int i = 0; i < 4; i++) {
//  triangle(x1 * i, y2 * i, x2 * i, y2 * i, x3 * i, y3 * i);
//}