facebook up up down down trick

How can the white triangle at the end of the lines of Roller Coaster Kingdom?
I play on demand "Roller Coaster Kingdom" Facebook, I wondered how to get the white triangle at the bottom of the lines you create. I'm sitting there delete, delete the paths, roads again, by putting the line again for one hour longgg. Haha. It's frustrating for me! Is there a trick to this? Or is it just coincidence? Ha!
Upon completion of your line, click on the end of the line with the usual route "tool", which means the part that you want the door input there. I Got It work for two separate periods, so hopefully this will solve your problem!
Facebook tricks
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