How to Make an Automatic Melon or Pumpkin Farm

[Caanite.]

1. Find a small flat area to build
2. Place a water source (if not trusted request for a mod to do it for you)
3. Use a hoe to till the grass nearby

(click to show/hide)

This is how it should look like
H=Hoed Grass, W=Water
W
H

4. Block of all but one side of the melon or pumpkin seeds off
5.Place a Sticky Piston 2 blocks under S in the spoiler
6.Place a Block 2 blocks away from S.
7.Place a Redstone Torch on the block

(click to show/hide)

H=Hoed Dirt, W=Water, B=Block, S=Sticky Piston, T=Redstone Torch
 W
BHB
  S  TB

8. Place a Repeater at full delay in between T and S
9.Make a loop of redstone with a repeater
10. (Optional) Place a note block connected to the circuit

(click to show/hide)

H=Hoed Dirt, W=Water, B=Block, S=Sticky Piston, T=Redstone Torch, R=Redstone, P=Repeater, N=Note Block
   W
  BHB
RRRSPTBRR
R   R       P   
RRRRRRRRR
          R
          N

11. Now Just Connect to a Canal using your preferred methods and your done
Note: I'll release screenshots once I make them