start: high 2 if pin3= 1 then display low 2 high 0 if pin3= 1 then display low 0 high 1 high 2 if pin3= 1 then display low 2 high 4 if pin3= 1 then display high 2 if pin3= 1 then display low 2 high 0 if pin3= 1 then display low 4 low 0 low 1 goto start Display: pause 3000 goto start