<iframe width='500px' height='400px' src='https://nest.ktbyte.com/nest#364071' allowfullscreen></iframe>

int start = 60; // middle C
int[] major = {0, 2, 4, 5, 7, 9, 11, 12, 14, 16, 17, 19, 21, 23, 24}; // the major pattern
int majorIndex = 0;
int note;

SoundCipher sc = new SoundCipher(this);


void setup(){
    size(300, 300);
    textSize(50);
    textAlign(CENTER,CENTER);
    
    // optional: note-based background with colorMode(HSB)
    colorMode(HSB);
}

void draw() {
    background((note - 60)*10, 200, 200);
    textSize(150);
    text(note,width/2, height/2);
    textSize(24);
    text("Click the canvas and \n press keys to play!", width/2, height-40);
}

void keyPressed(){
    // get a random note, or one from the major scale
    note = getMajorNote();//getRandomNote();
    
    sc.playNote(note,40,1);
}

void mousePressed() {
    note = start + major[majorIndex];
    sc.playNote(note,40,1);
    
    // increase majorIndex, but don't let it get too high!
    majorIndex++;
    majorIndex %= major.length;
}



int getRandomNote(){
    //pick an entirely random note!
    int rand = (int)random(60,85);
    return rand;
}



int getMajorNote(){
    //use only the notes in the major scale!
    //to find the scale, find a stating place (60) and the follow this pattern ...
    //   whole, whole, half, whole, whole, whole, half
    // where "whole" means a jump of two notes and "half" means a jump of one note
    
    
    int randIndex = (int)random(0,major.length); // pick an index at random
    
    // return the note instead of the index
    return major[randIndex] + start;
}