movement

os.loadAPI("/apis/general")
g = general

function go(distance,fn1,fn2,fn3)
  distance = g.getnum(distance,1)
  fn1 = g.getfunc(fn1)
  fn2 = g.getfunc(fn2)
  fn3 = g.getfunc(fn3)
  for i=1,distance do
    while fn1() == false do
      if fn2() == false and fn2 == false then return false end
    end
  end
end

function forward (distance)
  go(distance,turtle.forward)
end

function back (distance)
  go(distance,turtle.back)
end

function up (distance)
  go(distance,turtle.up)
end

function down (distance)
  go(distance,turtle.down)
end

function left (distance)
  go(distance,turtle.turnLeft)
end

function right (distance)
  go(distance,turtle.turnRight)
end