First off, you're using the millis() method incorrectly. The millis() method does not take any arguments, so I don't know what you think millis(10000) is going to do. Take a look at the reference: http://www.processing.org/reference/millis_.html
The millis() function simply returns the number of milliseconds since the start of the program. You can use that to create delays by comparing that to some threshold value. This example program only draws a circle after 5 seconds have elapsed:
void draw(){
background(0);
if(millis() > 5000){
ellipse(10, 10, 50, 50);
}
}