Kitchen Timer with Relay and Magnetic Switch

Using Arduino Project Guidance
2 
    if (minutes == 0 & seconds == 0)
    {
      //do nothing
    }

Do nothing? I thought you wanted to turn the relay off.

  if (digitalRead(MagSwitch) == LOW){ //if magnetic switch is detected
  else if (digitalRead(MagSwitch) == HIGH) //if no magnetic switch detected

If the output from digtialRead() isn't HIGH and it isn't LOW, what is it?

No Serial.print() statements outside of setup(). I'm sure that there is a reason for that, but what it could possibly be escapes me.