#include <avr/io.h>        
  
  #define led 7
  #define sensor 1
  
  int main(void) 
  {  
    ddrb = ddrb & ~(1<<sensor);    
    ddrc = ddrb | (1<<led);        
    while (1)
    {
      if(pinb & (1<<sensor))
        portc |= (1<<led);    
      else
        portc &= ~(1<<led);  
    }
    
    return 0;
  }