middle school wall inspiration...

I am just trying to wrap my head around it...

What if you were really good yesterday...will it be a hard day today...because you have to be super good today?

or if you were really bad will it be easier day because you just have to be not as bad.

If you were not so bad do you just have to strive for not so good? or is not so bad the same as... not so good? Or is not so bad better than not so good?

is better that same as good? Would it be better if the sign said "Be gooder than you were yesterday"...So you start with being good?