size(600,600);
background(255);

strokeWeight(2);

line(50, 50, 550, 50);
line(50, 50, 50, 550);

fill(0);
triangle(550, 40, 560, 50, 550, 60);
triangle(40, 550, 60, 550, 50, 560);
circle(50, 50, 8);
                                         
strokeWeight(1);
for(int x = 1; x <= 10; x++) {
  line(50, 50 + (x * 50), 550, 50 + (x * 50));
  text(((x-1)), 35, ((x-1) * 50) + 53);
}

for(int y = 1; y <= 10; y++) {
  line(50 + (y * 50), 50, 50 + (y * 50), 550);
  text(((y-1)), ((y-1) * 50) + 47, 35);
}

save("activity8.png");