v start# @ 10
v stop# @ 0
v step# @ -1
do
    v testStep# #> step# 0
    if testStep#
        v test# #<= start# stop#
        if test#
            p start#
            v start# + start# step#
        else
            exit
        fi
    else
        v test# #>= start# stop#
        if test#
            p start#
            v start# + start# step#
        else
            exit
        fi
    fi
loop
p done






