pinMode(motor1_enable, OUTPUT);
pinMode(motor1a, OUTPUT);
pinMode(motor1b, OUTPUT);
pinMode(motor1_enable, OUTPUT);
pinMode(motor1a, OUTPUT);
pinMode(motor1b, OUTPUT);
pinMode(right_trigger, OUTPUT);
pinMode(right_echo, INPUT);
pinMode(right_trigger, OUTPUT);
pinMode(right_echo, INPUT);
digitalWrite(motor1_enable, LOW);
digitalWrite(motor1a, LOW);
digitalWrite(motor1b, LOW);
digitalWrite(motor1_enable, LOW);
digitalWrite(motor1a, LOW);
digitalWrite(motor1b, LOW);