curr -> y = valy;
                curr = curr -> next;
                valx = tmpx;
                valy = tmpy;
            }
            setcolor(BLACK);
            curr = start;
            while(curr != NULL)
            {
                circle(curr -> x , curr -> y,5);
                curr = curr -> next;
            }
            delay(150);
            setcolor(YELLOW);
            curr = start;
            while(curr != NULL)
            {
                circle(curr -> x, curr -> y,5);
                curr = curr -> next;
                }