Revert "Revert "rotation testings""

This reverts commit d654d3af22f52da4792faee39c4e51cc284c4ea1.
Revert "Merge branch 'master' of https://github.com/marcoag/orol"

This reverts commit 7e9fc7f902818c1d9ac10115d1a0f0c4e92af391, reversing
changes made to 66f236b05f097eb303c413296194681629a75f43.