Could you please complete the highlighted area

enum{idle, Forward, Backward): int DC1 = 9; int DC2 = 8; int FB = 4; int BB = 5; int current; void setup pinMode(DC1,OUTPUT); pinMode(DC2,OUTPUT); pinMode(FB,INPUT_PULLUP): pinMode(BB,INPUT PULLUP); current=Idle; } void output(int dc1Val, int dc2Valy digitalWrite(DC1,dc1Val); digitalWrite(DC2,dc2Val); } void loop switch(current) case Idle: output(0,0); if (digitalRead(FB)==0) current = Forward: if (digitalRead(BB)==0) current = Backward; break; case Forward: [A] [B] break; case Backward: break; }