#include <avr/io.h> //initialized avr input/output library
#include <util/delay.h> //initialized avr input/output library


#define F_CPU20000UL //define clock processing
#define LED PORTA //Define LED port
#define Button PA7 //Define button port

int delaynum=2500;

int main (void)
{
  DDRA = 0b00000100;
  
    while(1){
      if (Button==1)
      {
        delaynum= delaynum/1.5;
        }
        
        LED = 0b00000100;
         _delay_ms(delaynum);
         LED = 0b00000000;
          _delay_ms(delaynum);
      }
}