depending what you want exactly
this will time out in 5 seconds
click yes it will echo $true
click no it will echo $false
let it time out it will echo $false
alias testinput {
var %input = $input(This is a test,yk5)
echo -a %input
}


This works the same but true and false are changed to yes no
alias testinput2 {
var %input = $input(This is a test,yk5)
if (%input == $true) { %input = yes }
if (%input == $false) { %input = no }
echo -a %input
}