#define led1 2
#define b1 3
#define led2 4
#define b2 5
#define led3 6
#define b3 7
#define led4 8
#define b4 9
#define led5 10
#define b5 11

void setup() 
{
    pinMode(led1, OUTPUT);
    pinMode(b1, INPUT_PULLUP);
  
    pinMode(led2, OUTPUT);
    pinMode(b2, INPUT_PULLUP);

    pinMode(led3, OUTPUT);
    pinMode(b3, INPUT_PULLUP);

    pinMode(led4, OUTPUT);
    pinMode(b4, INPUT_PULLUP);

    pinMode(led5, OUTPUT);
    pinMode(b5, INPUT_PULLUP);

}

void loop() 
{
  start:

     if(digitalRead(b1)==0)
     {
       l1:
         if(digitalRead(b1)==1)
         {
           digitalWrite(led1,!digitalRead(led1));
           goto start;
         }
       delay(10);
       goto l1; 
      
     }

     if(digitalRead(b2)==0)
     {
       l2:
         if(digitalRead(b2)==1)
         {
           digitalWrite(led2, !digitalRead(led2));
           goto start;
         }
        delay(10);
        goto l2; 
       }

    if(digitalRead(b3)==0)
     {
       l3:
         if(digitalRead(b3)==1)
         {
           digitalWrite(led3, !digitalRead(led3));
           goto start;
         }
        delay(10);
        goto l3; 
     }

     if(digitalRead(b4)==0)
     {
       l4:
         if(digitalRead(b4)==1)
         {
           digitalWrite(led4, !digitalRead(led4));
           goto start;
         }
       delay(10);
       goto l4; 
     }

     if(digitalRead(b5)==0)
     {
       l5:
         if(digitalRead(b5)==1)
         {
           digitalWrite(led5, !digitalRead(led5));
           goto start;
         }
        delay(10);
        goto l5; 
     }
delay(20);
}