Seven Lines of colour

What's that wonder in the sky
That interest me from oh so high
Seven colours shining bright
Like like Twilight lines from a height
First is red so brave and bold
Then comes Orange turning the mist to Gold
Yellow shine like the morning light
As green wake up the leaves bright
blue floors like the sea and the sky
as Indigo goes by and buy
Violet is shining like a glow
Now I see it's a rainbow