Mining turtle menu selector

-- https://pastebin.com/s9Yp5mXt --
--Menu--
print("Enter tunnel size")
print("1 - 1x1")
print("Efficiency=2")
print()
print("2 - 1x2")
print("Efficiency=1.5")
print()
print("3 - 3x3")
print("Efficiency=1.111")
print()
print("Var-Variable")

tunnelsize=read()

if tunnelsize=="1" then
    do
        shell.run("Tunnel1")
    end
end

if tunnelsize=="2" then
    do
        shell.run("Tunnel2")
    end
end

if tunnelsize=="3" then
    do
        shell.run("Tunnel3")
    end
end

if tunnelsize=="Var" then
    do
        shell.run("Variable")
    end
end