Draw two concentric red circles

Listing 4 calls the circle function twice in succession to draw two large concentric circles that are centered on the window in Figure 1.

Listing 4. Draw two concentric red circles.

//Inscribe a large red circle in the window. circle(screen,200,200,200,makecol(255,0,0)); //Draw another red circle inside of that one. circle(screen,200,200,190,makecol(255,0,0));