Stuck on puzzle 94 (Get the ball out) 4 Can anyone help. Game Nintendo DS Professor Layton and the Curious Village

094 Get the Ball Out! 4
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1. If you're persistent in your efforts, you'll eventually get the ball to
the hole, but there are tricks to streamline the process.
The large block in the puzzle is relatively limited in range of
movement, so you're going to have to do more work with the smaller and
more maneuverable blocks. If you focus on them and plan out a route,
things should go smoothly.
2. If you move the green block on the right down, you can fill the space
you create with a purple block from the right. If you can pull that off,
you'll be able to move the blue block in the upper left, which will
allow you to move the red ball out of its slot.
It may seem complicated, but give it a try.
3. There is no set solution to this problem.
Here's one way to start out. Move the lower-left purple blocks, then
slide the lower blue block to the left.
Next, drop the green block on the right down.
The rest is up to you.

However, I have found the following sequence if you can follow it to get it done in 21 moves:

094 Get the Ball Out! 4
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Purple block = P
Yellow block = Y
Green block = G
Red ball = R
(l)eft (r)ight (u)p (d)own

P[d],P[l],B[l],G[dd],P[dd],P[rd],B[rr],R[dr],G[uu,Y[l],P[rd],
B[d],R[rru],B[ul],R[ddl],P[uuu],R[rd],P[u],R[l],G[uuu],R[rdd] = 21 moves

Thanks and please take a moment to rate as fixya.