define age as integer and set it to 0

display "Enter your age: "
take user input for variable age

compare if age is equal to 1
    display "First Birthday"

compare else if age is more than or equal to 12 OR less than or equal to 19
    display "Teenager"

compare else if age is less than 12
    display "Child"

compare else if age is more than 62
    display "Senior"

else (used as catching anything else)
    display "Adult"