void setup(){ 
    serial.begin(115200);
    pinMode(27,OUTPUT);
    pinMode(14,OUTPUT);
    pinMode(12,OUTPUT);
    // traffic ligt1
    pinMode(21,outpu);
    pinMode(19,OUTPUT);
    pinMode(18,OUTPUT) ;
    //traffic light 2
}
void loop(){
    digitalwrite(27,HIGH) ; 
    digitalwrite(18,HIGH);
    delay(1500);
    digitalwrite(27,LO);
    digitalwrite(18,LO);
    delay(1300);
    digitalwrite(14,HIGH);
    digitalwrite(19,HIGH);
    delay(1200);
    digitalwrite(14,LO)
    digitalwrite(19,LO);
    delay(1190);
    digitalwrite(12,HIGH);
    digitalwrite(21,HIG);
    delay(1040);
    digitalwrite(12,lo);
    digitalwrite(21,LO);
    delay(1020); 
}