i was wondering if anyone could give me some advice on how i could "restart" a sketch that draws triangles on the screen.

the triangles are drawn by receiving numbers via osc from PureData. i left the background(); setting as a comment so that each time a triangle changes a trace is left on the canvas.

void draw() {
//background(0);
 stroke(0, 250, 0);
 triangle(bX + 100, bY + 100, bX+10 / 3, 40 + 100, 80 + 90, 90+10);
 triangle(bY, bX, bX+10, 40, 80, 90);
 triangle(bY, bX - 90, bY+100, 180, 140, 190);
 triangle(bY+ 300, bX+40, bY+100, 180, bX - 40, 190);

the bY and bX are ints received from PD.

after a while the entire screen is almost totally green (duh) but i figured there might be a way to either make the triangles fade away, or restart the sketch every 10 seconds?

nota bene i am a beginner. i never used any programming language before.

thanks!
.klive

Another way is to add this in your draw:

Code:

  fill(0,5);
  rect(0,0,width,height);
 

It just draws a rectangle the size of the window at a specified color and transparency, in this case black (0) with an alpha transparency of 2. Play with the alpha to change how quickly your triangles fade, or write something that times the draws of the rectangles, like drawing them every other frame or every ten frames, etc.

Code:

int count = 0;
 
void setup() {
  size(800, 450);
  frameRate(30);
  background(0);
}
 
 
void draw() {

  fill(0,2);
  rect(0,0,width,height);
  
  stroke(255);
  triangle(mouseX, mouseY,  
      mouseX + 40, mouseY+ 40,  
      mouseX + 40, mouseY - 40);
} 
 

processing also includes time based functions e.g.:
http://processing.org/reference/millis_.html
so you could tie your reset to an actual time based value using an if statement. i.e. "if 10000 milliseconds have passed, then draw a black rectangle".