Very straightforward. Choose a code ID first (Backwards=1, Atbash=3..) Do all the next steps that it asks you to do. Comment your codes!
qfhg hlnv nzgs zmw xlwrmt gszg r dzh kozbrmt zilfmw drgs. (Atbash) h gzc knsr ne etm! fn hmrhcd sn rdd zkk sgd bqzyx lzsg! (Add letter value by 1)
