Enderman Farming

Ok so I got 2 melee turtles placed down ready to go, and I have no idea how to code. I thought I did it right, but it gives me <eof> expected on line 5
Program so far:

Spoiler

turtle.forward()
if turtle.forward()==false then
   turtle.attack()
   end
else
   turtle.forward(16)
   end

Basically its a 2 block wide stretch of glowstone, 17 blocks long, enderman fall and almost die, I need my turtle to go forward, if it cant, attack the enderman, and keep moving. Once its at the end, I need it to turn around, and come back, and then drop it in a chest behind it.
Thanks for any help!

It's if / else / end, not if / end / else / end. Remove the end from just before the else and it should work fine. Be aware that turtle.forward(16) is still only going to move one block forward, since turtle movement command don't accept arguments.

Based on Lyqyd's instruction, here is how it should be.

turtle.forward()
if turtle.forward() == false then
   turtle.attack()
else
   for i=1, 16 do
	   turtle.forward()
   end
end

Also, note that you can check for a block with turtle.detect() without actually moving forward.