RGB Led Project - Help

/*var sensor = require("HC-SR04").connect(C6,C7,function(dist) {
  console.log(dist+" cm away");
});
setInterval(function() {
  sensor.trigger(); // send pulse
}, 500);
*/

SPI2.setup({baud:3200000, mosi:B15});
var rgb = new Uint8Array(50*3);

var pos=0;

function lightsOff() {
  clearInterval(cycle);
  pos++;
  for (var i=0;i<rgb.length;i+=3) {
    rgb[i  ] = 0;
    rgb[i+1] = 0;
    rgb[i+2] = 0;
  }
 
  SPI2.send4bit(rgb, 0b0001, 0b0011);
  
}
 
var patterns = [];
//patterns.push(lightsOff);
patterns.push(function() {
  // Fading white lights
  LCD.clear();
 
  pos++;
  for (var i=0;i<rgb.length;i+=3) {
     var col = (Math.sin(i+pos*0.2)+1) * 127;
     rgb[i  ] = col;
     rgb[i+1] = col;
     rgb[i+2] = col;

  }
});
patterns.push(function() {
  // Red Light
   
  
  pos++;
  for (var i=0;i<rgb.length;i+=3) {
     var col = 255;
     rgb[i  ] = col;
     rgb[i+1] = 0;
     rgb[i+2] = 0;
 
  }
});
patterns.push(function() {
  // Green Light 
  pos++;
  for (var i=0;i<rgb.length;i+=3) {
     var col = 255;
     rgb[i  ] = 0;
     rgb[i+1] = col;
     rgb[i+2] = 0;

  }
});
patterns.push(function() {
  // Blue Light 
  pos++;
  for (var i=0;i<rgb.length;i+=3) {
     var col = 255;
     rgb[i  ] = 0;
     rgb[i+1] = 0;
     rgb[i+2] = col;

  }
});
patterns.push(function() {
  // Yellow light
  pos++;
  for (var i=0;i<rgb.length;i+=3) {
     var col = 255;
     rgb[i  ] = col;
     rgb[i+1] = col;
     rgb[i+2] = 0;

  }
});
patterns.push(function() {
  // Cyan light
  pos++;
  for (var i=0;i<rgb.length;i+=3) {
     var col = 255;
     rgb[i  ] = 0;
     rgb[i+1] = col;
     rgb[i+2] = col;

  }
});
patterns.push(function() {
  // Fading colours
  pos++;
  for (var i=0;i<rgb.length;i+=3) {
     rgb[i  ] = (1 + Math.sin((i+pos)*0.1324))*127;
     rgb[i+1] = (1 + Math.sin((i+pos)*0.1654))*127;
     rgb[i+2] = (1 + Math.sin((i+pos)*0.1)) * 127;

  }
});
patterns.push(function() {
  // Random blue lights
  for (var i=0;i<rgb.length;i+=3) {
     rgb[i  ] = 0;
     rgb[i+1] = 0;
     rgb[i+2] = Math.random()*255;

    }
});

var getPattern = patterns[0];

function changePattern() {
  patternNumber = (patternNumber+1) % patterns.length;
  getPattern = patterns[patternNumber];


  SPI2.send4bit(rgb, 0b0001, 0b0011);
}

var patternNumber = 0;
function changePattern() {
  patternNumber = (patternNumber+1) % patterns.length;
  getPattern = patterns[patternNumber];
}

setWatch(changePattern, BTN, { repeat: true, edge:'rising', debounce: 50 });

//cycle = setInterval(doLights,50);
// this below was ^
function doLights() {
  getPattern();  
  for (var i=0;i<rgb.length;i+=3) {
    LCD.setColor(rgb[i+0]/256,rgb[i+1]/256,rgb[i+2]/256);
    LCD.fillRect(i,0,i+2,10);
  }
  SPI2.send4bit(rgb, 0b0001, 0b0011);
}