This sample code is for Colourful Bed Lamp Using Tilt Sensor on Maker UNO tutorial.

bedLamp.ino

const int tiltPin =  2;
const int redLed =   11;
const int greenLed = 10;
const int blueLed =  9;

int tiltState;
int count = 0;

void setup() {
  pinMode(redLed,  OUTPUT);
  pinMode(greenLed, OUTPUT);// initialize the pushbutton pin as an input:
  pinMode(blueLed, OUTPUT);
  pinMode(tiltPin, INPUT);
}

void loop() {
  tiltState = digitalRead(tiltPin);

  if (tiltState == HIGH) {
    count++;

    if (count > 8) {
      count = 0;
    }

    switch (count) {

      case 0: // off
        analogWrite(redLed, LOW);
        analogWrite(greenLed, LOW);
        analogWrite(blueLed, LOW);
        break;

      case 1: //red
        analogWrite(redLed, 255);
        analogWrite(greenLed, 0);
        analogWrite(blueLed, 0);
        break;

      case 2: //orange
        analogWrite(redLed, 255);
        analogWrite(greenLed, 128);
        analogWrite(blueLed, 0);
        break;

      case 3: //yellow
        analogWrite(redLed, 255);
        analogWrite(greenLed, 255);
        analogWrite(blueLed, 0);
        break;

      case 4: //green
        analogWrite(redLed, 0);
        analogWrite(greenLed, 255);
        analogWrite(blueLed, 0);
        break;

      case 5: //blue
        analogWrite(redLed, 0);
        analogWrite(greenLed, 0);
        analogWrite(blueLed, 255);
        break;

      case 6: //purple
        analogWrite(redLed, 127);
        analogWrite(greenLed, 0);
        analogWrite(blueLed, 255);
        break;

      case 7: //pink
        analogWrite(redLed, 255);
        analogWrite(greenLed, 0);
        analogWrite(blueLed, 255);
        break;

      case 8: //white
        analogWrite(redLed, 255);
        analogWrite(greenLed, 255);
        analogWrite(blueLed, 255);
        break;

      default:
        break;
    }

    delay(500);
    while (digitalRead(tiltPin));
    delay(500);
  }
}