//BCD 1 int a1 = 4; int a2 = 5; int a3 = 6; int a4 = 7; void setup() { pinMode(4,OUTPUT); pinMode(5,OUTPUT); pinMode(6,OUTPUT); pinMode(7,OUTPUT); } void loop() { disp1(8); } void disp1(int num) { if(num == 8) { digitalWrite(a1, LOW); digitalWrite(a2, LOW); digitalWrite(a3, LOW); digitalWrite(a4, HIGH); } }