draw_line
draw_line(x,y,x+w,y,color);
draw_line(x,y,x,y+h,color);
draw_line(x,y+h,x+w,y+h,color);
draw_line(x+w,y,x+w,y+h,color);
void draw_line(int x1, int y1, int x2, int y2, int color);
draw_line(xCoord1,yCoord1,xCoord2,yCoord2,color);
draw_line(xCoord1,yCoord1,xCoord2,yCoord2,color);