I'm so empty

I thought up to be a great painter
Because you can not go out of this room
I'm sorry to be such vainglorious
On the pallet, I put all my colors

I changed my brush to my guitar
Before long you lost your sight
With the 3 cords I just have learnt
I tried to show you what you can not see

Alone in my room, I am so empty
Because you were gone so far away
I will sing tonight wishing you will hear
Bad pictures and terrible songs