/*This is a blink sketch by Joern Kiwitt*/

#include <avr/io.h>
#includ <util/delay.h>

#define F_CPU16000000UL
#define LED_IO_PORT DDRB
#define SWITCH_IO_PORT DDRA
#define LED_OUTPUT_PORT PORTB

int main(void){
  
//set the LED DDR to output (PB2 on the Attiny)
  LED_IO_PORT=0b00000100;
//ste the SWITCH DDR to input (PA7 on the Attiny) - not necessary
  SWITCH_IO_PORT=0b00000000;

while(1){
// Read button 
if(PINA ==0b10000000){
  // Bounce time
  _delay_ms(5);

// Check that it was really pushed
if(PINA ==0b10000000)
  switchLED();
}

void switchLED(){
//PA7 is a switch
if(PORTA == 0b10000000){
    //LED off
    PORTB = 0b00000100;
  }
  else if(
    PORTA == 0b10000000){
    //LED off
    PORTB = 0b00000100;
  }
}