'Do While demonstration

input 1  'Button tied to pin 1 with pull down resistor and other side tied to vdd
output 2 'led tied between vss and pin2

out2 = 0 'Make sure led is low

'The main loop
main
 
 'Check to see if the button is down
 if in1 = 1 then
    high 2 : pause 300 :low 2 'Blink the LED
    
    'Now just waste some time until button is released
    'As long as in1 = 1 we will stay in this loop
    do  
      while in1 = 1
    
 endif
 

 
 goto main