Oh so they just can't go backwards, I'll make a loop track then. Thanks!

It's just one rail with one train, no signals. Here are some screenshots:

https://s27.postimg.org/bzuw50eqn/image.png
https://s27.postimg.org/l8x2f4nmn/image.png
https://s27.postimg.org/cfarbrq1r/image.png
https://s27.postimg.org/t5m513ogv/image.png
https://s27.postimg.org/m3o7ewkv3/image ...