Cyl

if turtle.getFuelLevel() < 1000 then
turtle.select(16)
turtle.refuel(64)
end
local BuildLength = 0
function AntiObstruct()
if turtle.detectDown() then
  turtle.digDown()
end
function PlaceBlock()
turtle.placeDown()
turtle.forward
end
function roundCorner()
turtle.forward()
turtle.turnRight()
turtle.forward()
turtle.turnLeft()
end
function BuildCylinder()
if(BuildLength < 10) then PlaceBlock() else
roundCorner()
if(BuildLength < 2) then PlaceBlock() else
roundCorner()
if(BuildLength < 1) then PlaceBlock() else
roundCorner()
if(BuildLength < 2) then PlaceBlock() else
roundCorner()
if(BuildLength < 10) then PlaceBlock() else
roundCorner()
turtle.select(1) -- building cylinder
term.clear()
end