local robot = require("robot")

return {
    forward = function(n)
        if not n then n = 1 end
        for _ = 1, n do
            while not robot.forward() do
                local result, desc = robot.detect()
                if result and desc == "solid" then
                    robot.swing()
                end
            end
        end
    end,
    back = function(n)
        if not n then n = 1 end
        for _ = 1, n do
            while not robot.back() do end
        end
    end,
    up = function(n)
        if not n then n = 1 end
        for _ = 1, n do
            while not robot.up() do
                local result, desc = robot.detectUp()
                if result and desc == "solid" then
                    robot.swingUp()
                end
            end
        end
    end,
    down = function(n)
        if not n then n = 1 end
        for _ = 1, n do
            while not robot.down() do end
        end
    end,
}