Help with delay/millis without influencing the framerate

[kll]

yes, use millis() to make a timer

The screen is updating after while loop is completed ? need help

here a example using a millis timer: long startT, stopT=1000; float ang = 0; float colc; color rf; void setup() { size(500, 500); colc=random(255); rf=color(colc, 0, 255-colc); } void myTimer() { if ( millis() > startT + stopT ) { startT = millis(); println("_next loop_"); // what else you need to be done now? ang++; colc=random(255); rf=color(colc, 0, 255-colc); } } void draw() { background(255, 244, 206); myTimer(); translate(width/2, height/2); …