// LED LIGHTING. Ignacio Peydro Duclos. MAS.863.12.
//
// 
//
// (c) Massachusetts Institute of Technology 2012
// Permission granted for experimental and personal use;
// license for commercial sale available from MIT.
//




#define output F_CPU 20000000 
#include <avr/io.h>
#include <util/delay.h>

int main ()
{
DDRA = _BV(PA7);
while (1) {

		if (PINA & _BV(PA3)) {
			PORT = 0;
	} else {
	PORTA = _BV(PA7);
	}
	}
}