Hello!
I'm sorry, but I haven't got any examples of previous work in this area. Although, I completed one project that was contained of writing 2 poems, but they were totally opposite of happy songs. However I am willing to write a few lines, like an intro for your song. I hope it fits in your idea of how it should be like. If there is any chance you like it, maybe you can send me instrumental of your song ( If there is one), so I could adjust lyrics to it. Thank you. Looking forward to hearing from you.
Example:
Each day has it's way
but this day is great.
I did my chores
I'm on the horse
My plan is going it's way
It's a simple plan
no philosophy
plan to be happy
But it's not just for me
This plan is meant to be
it's for everybody, EVERYBODY
And when you're happy, share you joy
when you're happy, don't be alone
Our happiness is meant to encourage
the rest of us all