/*Toggle LED with a Tact Switch Input */
 // Define LED * RB0 and Tact switch * RD0
 sbit LED at RB0_bit;
 sbit Switch at RD0_bit;
void main() 
{
 	TRISB = 0; // PORTB All Outputs
PORTB=0;
 	TRISD = 0b00000001; // PORTD All Outputs, Except RD0
PORTD=0;
do 
{
  		if(Switch==0)
{
Delay_ms(20);
    			if (Switch ==0)  
{
    				LED = ~LED;
    			}
    		while (Switch ==0); // Wait for release of the button
  	}
 } while(1);  // Infinite Loop
}

bit oldstate;
char counter = 0 ;
void main()
{
oldstate=0;
TRISD.F0 = 1; 	//pin RD0 as input – it doesn’t matter if you are using F0 or B0
TRISB = 0x00; 	// PORTB as output
PORTB = 0x00; 	// PORTB pins are all “off”

while(1) 					// Endless loop
{
if(PORTD.F0 == 1) 			// Detect logical one 

{
Delay_ms(10); 			// “debouncing” mechanical contacts
oldstate = 1; 				// Update flag
}

if (oldstate && PORTD.F0 == 0)		 // Detect one-to-zero transition, pressed

{
Delay_ms(10); 			// “debouncing” mechanical contacts
counter++ ; 				//   Action
oldstate = 0; 				// Update flag
if(counter==5) counter=0;
}

if(counter==1) portb=0b00000001 ;
else if(counter==2) portb=0b0000010 ;
else if(counter==3) portb=0b0000100 ;
else if(counter==4) portb=0b0001000 ;
else portb=0;

} 
}