Rainbows

It's been years
Since I've seen a rainbow.
I turn, my eyes raking the sky
And then, colour fills my vision,
Wonder brims,
As the arc of light grows across the sky,
First one side, then the other,
Slowly arching upwards til they join together
And then leave their echo,
A paler version on the outside.
The pair shine,
Impossibly bright
Against the rain clouds behind,
And I stand and stare
Until they fade from sight.