The Beauty Of The Eraser

I hold my pencil in my hand,
I Grip it tight to let it flow,
I lead it left then right again,
I make a circle,
Big and round,
I make a square,
Then turn it around,
I try and focus,
On the Vision in my head,
I erase,
Then draw again.
Even when I make a mistake,
I'll Try,
And try again,
Until the picture in my head,
Is just right.
It might take a while,
Days and nights.
But when I finish,
That canvas wont be blank.