The translate() function allows objects to be moved to any location within the window. The first parameter sets the x-axis offset and the second parameter sets the y-axis offset.
Original Processing.org Example: Translate
// All Examples Written by Casey Reas and Ben Fry
// unless otherwise stated.
float x, y;
float s = 40.0;
void setup()
{
size(200,200);
noStroke();
frameRate(30);
}
void draw()
{
background(102);
x = x + 0.8;
if (x > width + s) {
x = -s;
}
translate(x, height/2-s/2);
fill(255);
rect(-s/2, -s/2, s, s);
// Transforms accumulate.
// Notice how this rect moves twice
// as fast as the other, but it has
// the same parameter for the x-axis value
translate(x, s);
fill(0);
rect(-s/2, -s/2, s, s);
}