# Two-Way Trains

Make four sectors, like the image shown. The two large sectors will be the track and platform, and the inside sector will be the actual train. |

Change the sector lotag of the two inside sectors to 31. |

Place a Sector Effector sprite inside the car sector, and change its lotag to 30. Change the angle of the SE-30 to point towards the front of the car. Change to 3d mode and raise the floor of the 2x1 sector inside the car. Place a switch flat against the wall of this raised sector, and change its lotag to a unique switch number, I'll use 1 in this example. Insert an Activator sprite within the car sector, and change its lotag to the same number you gave to the switch lotag. The Activator is what triggers the SE-30 when the switch is flipped.

Place two Locator sprites, one on each end of the track, to mark the two points at which the car will stop. Change the lotag of one of the two Locator sprites to 1, it then becomes point B. |

You can trigger separate events when the car stops at the two Locator positions. For instance, you can have a door open when the car stops at the left-most position. I'll show an example of having two doors open up, each opens when the car stops at that given Locator. To do this, you need to change the SE-30 hitag to a unique Activator number, I'll use 5. We then place an Activator sprite in the two door sectors. They will then trigger the Sector Tag (or SE if one was there) within those sectors. Here, we want to trigger a door, which is Sector Tag 20. Change the lotag of the Activator you wish to be triggered when the car stops at point A to the same number you gave to the SE-30 hitag (5). Move over to the other Activator, and change its lotag to 1 + the SE-30 hitag (6). This will trigger when the car stops at point B.

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