IPA AHK script: M and N

+n::
if (Mod(togglemode,5) = 0) {
    SendInput ŋ
    TrayTip IPA Symbol, Velar nasal, 1, 1
} else if (Mod(togglemode, 5) = 1) {
    SendInput {backspace}ɲ
    TrayTip IPA Symbol, Palatal nasal, 1, 1
} else if (Mod(togglemode, 5) = 2) {
    SendInput {backspace}ɴ
    TrayTip IPA Symbol, Palatal nasal, 1, 1
} else if (Mod(togglemode, 5) = 3) {
    SendInput {backspace}ɳ
    TrayTip IPA Symbol, Retroflex nasal, 1, 1
} else if (Mod(togglemode, 5) = 4) {
    SendInput {backspace}n
    TrayTip IPA Symbol, Alveolar nasal, 1, 1
}
togglemode += 1
SetTimer #a, -450
return