My Front Door Is Gilbert O'Sullivan

I'm doing something I don't understand
What I am doing, although I have planned
Out everything yesterday morning
I saw you walk by My front door is blue
How about you

Coming around to see me in the spring
Mattress on my bed, there's one sheet missing
Since last July, I don't know why
I let you walk right pass
My front door is green. Have you seen

Anybody with a name
Should know how to spell
It unless he is insane
And I'm very well

Thank-you I do know how to knot my tie
Is covered completely with letters I
Owe to you I promise to pay you back should you
Pass My front door ready at last