Call this function in setup() to fix the orientation of the phone to landscape or portrait and avoid auto-rotate (which restarts the app):
void setup() {
orientation(LANDSCAPE);
}
void draw() {
background(255);
line(0, 0, width, height);
line(0, width, 0, height);
}
void setup() {
orientation(PORTRAIT);
}
void draw() {
background(255);
line(0, 0, width, height);
line(0, width, 0, height);
}