PFont f;
String message = "this text is spinning";
float theta;

void setup() {
	size(400, 400);
	f = createFont("Arial",48,true);
}

void draw() { 
	background(255);
	fill(0);
	textFont(f);                  // Set the font
	translate(width/2,height/2);  // Translate to the center
	rotate(theta);                // Rotate by theta
	textAlign(CENTER);            
	text(message,0,0);            
	theta += 0.02;                // Increase rotation
}