Smiley Face

size(200, 200);

//green
fill(0, 255, 0);

//draw the head
ellipse(100, 100, 150, 150);

//white
fill(255);

//draw the eyes
ellipse(75, 85, 30, 20);
ellipse(125, 85, 30, 20);

//black
fill(0);

//draw the pupils
ellipse(75, 85, 10, 10);
ellipse(125, 85, 10, 10);

//red
fill(255, 0, 0);

//draw the mouth
arc(100, 125, 80, 50, 0, 3.14);
line(60, 125, 140, 125);

This code calls a series of functions do draw a smiley face:

The arc() function takes 6 parameters: the first 4 parameters define an ellipse, and the last 2 parameters specify a limit (in radians) that causes the computer to only draw part of the ellipse. In radians, 0 is the right-most point of the ellipse, and pi (we’re using 3.14 which is close enough) is the left-most point of the ellipse. That lets us draw only half the ellipse for the mouth.

Tweak Ideas

• Change the face to a frown face
• Don’t stop there! Can you make it look sad? Angry? Scared? In love?
• Add ears, hair, a nose, maybe even a body.
• Try to draw yourself, one of your friends, or your favorite characters.