void setup()
{
  int num_heads = 0;
  int num_tails = 0;
  
  for( int idx = 0; idx < 100000; ++idx ) {
    float r = random( 10 );
    if( random(1) < 0.75 ) {
      ++num_heads;
    } else {
      ++num_tails;
    }
  }
  
  println( "I saw " + num_heads + " heads and " + num_tails + " tails." );
}