import processing.sound.*;

SoundFile[] file;

// Define the number of samples 
int numsounds = 5;
int bpm       = 280;
int divider   = 16;
int duration  = int((60/float(bpm))*1000);
int beat      = 0;

int[][] samples = {  
   {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
};

void setup() {
  size(640, 360);
  background(255);

  // Load sound files
  file = new SoundFile[numsounds];
  for (int i = 0; i < numsounds; i++) {
    file[i] = new SoundFile(this, "bank1/" + (i+3) + ".wav");
  }

}

void draw() {
  background(255);
  stroke(255);
  
   for(int i=0; i<4; i++) {
    fill(90);
    for(int y=0; y<divider; y++) {
      rect((width/divider)*y,(height/4)*i, width/divider, height/4);
    }
  }
  
  

  for(int i=0; i<4; i++) {
    
    fill(150);
    if(samples[i][beat] != 0) {
      fill(0, 200, 0);
      file[samples[i][beat]+1].play();
    }
    rect((width/divider)*beat,(height/4)*i, width/divider, height/4);
    
  }
  
  beat++;
  if(beat>=divider){beat=0;}
  
  delay(duration);

}