// Using a momentary switch to alternate behavior 
// each time it is pressed

// Variables
int mySwitch = 0;
int switchPin = 8;
// Variables to track toggling of the switch
int whichToggle = 1; 
int toggleFlag = 1;

// Setup
void setup() {
  Serial.begin(9600);
  pinMode(switchPin, INPUT);
}

// Das loop...
void loop() {
  // Look for the switch's status in every cycle of the loop.
  // Note that the switch is set to be normally HIGH
  mySwitch =  digitalRead(switchPin);
  // Toggling a switch presents a problem. If you hold down the switch,
  // it will toggle back and forth while it's held down unless you
  // use another variable (toggleFlag) to track whether or not the switch 
  // has been released, and use that variable to keep the toggle from 
  // occuring while the switch is held down.
  if(!mySwitch) {                  // Check if the switch is pressed        
    if (toggleFlag) {              // Check if toggleFlag is true.
      whichToggle = !whichToggle;  // If it is, then toggle whichToggle
      toggleFlag = 0;              // and turn toggleFlag off.
    }
  }else{
    toggleFlag = 1;                // Reset toggleFlag when the switch
  }                                // is released.
  Serial.println(whichToggle);    
}