Processing Sort Tester

int num = 500;
int step = 500;

int[] values = new int[ num ];
int left = 0;

void setup() {
  size( num, num );
  for ( int i = 0; i < num; i++ )
    values[i] = 0;

  for ( int i = 0; i < num; i++ ) {
    int r = int( random( 0, num ) );
    if ( values[r] == 0 ) {
      values[r] = i;
    } else {
      i--;
      continue;
    }
  }
}

void draw() {
  background( 180 );

  for ( int i = 0; i < num; i++ )
    point( i, values[i] );

  if ( left > 0 ) {
    sortOnce();
    left--;
  }
}

void sortOnce() {
  int x = 0;
  while ( true ) {
    if ( values[x] < values[x+1] ) {
      x++;
      if ( x == num )
        break;
      continue;
    }
    int t = values[x+1];
    values[x+1] = values[x];
    values[x] = t;
    break;
  }
  // sort values one step
}

void keyPressed() {
  if ( key == ' ' ) {
    left += step;
  }
  if ( key == 's' ) {
    saveFrame("pic####.png");
  }
}