The follow in program uses the button to control the LED
/* Diyode CodeShield Base Script */
#define ENCODER_A 14
#define ENCODER_B 15
#define ENCODER_PORT PINC
#define SWITCH 13
#define BUTTON 12
#define RGB_RED 11
#define RGB_GREEN 10
#define RGB_BLUE 9
#define LED 6
#define SERVO 5
#define PIEZO 3
#define RELAY 2
#define POT 2
#define HALL 3
#define THERMISTOR 4
#define PHOTOCELL 5
void setup() {
pinMode(BUTTON, INPUT);
pinMode(LED, OUTPUT);
}
void loop() {
digitalWrite(LED, digitalRead(BUTTON));
}