Diversity

Clouds in the sky have different shade
They glow in lights, either dim or fade!
Suddenly new ones come and cloak the air,
To renew our visions and make things fair!

Rainbows are born among the light and rain
To soothe viewer's eyes and remove all pain!
Life bathes in motion to plant new seeds,
And waits for creatures with creative deeds!
This goes on and on since the ancient days,
And people just flock, like bright sun rays!

We know, color or creed works as a dam
To promote any progress, or create a jam!
No one gains through the screeching halt,
'Cause faith is taken with a grain of salt!
But removal of notions may clear the way,
And build the bridge that will never sway!

So, let us all now blend our ethnic voice,
To kill any prejudice, or color of choice!
Progress via Diversity: let it be the key
Around the globe, from heaven to sea!!!

Find the big metaphor in the peom.
Explain and support from text.