mBlock Logic

Components

IR Sensor 1 → D2
IR Sensor 2 → D3
Servo Motor → D9

mBlock Logic

When Arduino Starts

Set Servo (D9) angle to 180

Forever

   If (Digital Read D2 = 0) OR (Digital Read D3 = 0)

      Set Servo (D9) angle to 90
      Wait 5 seconds
      Set Servo (D9) angle to 180

   End If

End Forever

Block Structure

[When Arduino Starts]
    ↓
[Set Servo D9 Angle 180]

[Forever]
    ↓
< (Read Digital Pin D2 = 0)
      OR
  (Read Digital Pin D3 = 0) >
    ↓
[Set Servo D9 Angle 90]
[Wait 5 Seconds]
[Set Servo D9 Angle 180]

Better Parking Gate Logic

If the car stays in front of the sensor for more than 5 seconds, the gate may close on the car.

Use:

Forever

   If (D2=0) OR (D3=0)
      Set Servo D9 to 90
   Else
      Set Servo D9 to 180
   End If

End Forever

This means:

Car detected by either sensor → Gate opens.
No car detected → Gate closes.