Hi, of course!

Try this:

Code (Text):

1. on fishing:
2.     if "%fishing state%" is "failed attempt" or "in ground":
3.         if block below hook is not air:
4.             if block below hook is not water or lava:
5.                 push player (direction from player to hook) at speed (distance between hook and player/3)
6.                 if (y coordinate of hook-1) > (y coordinate of player):
7.                     push player upward at speed ((0.07000000000000001)*(difference between y coordinate of hook and y coordinate of player))
8.                 play raw sound "mob.zombie.infect" at player with pitch 2 volume 1
9.         else if block at hook is not air:
10.             push player (direction from player to hook) at speed (distance between hook and player/3)
11.             if (y coordinate of hook-1) > (y coordinate of player):
12.                 push player upward at speed ((0.07000000000000001)*(difference between y coordinate of hook and y coordinate of player))
13.             play raw sound "mob.zombie.infect" at player with pitch 2 volume 1
14.         else if block below hook is air:
15.             if block below block below hook is not air or water or lava:
16.                 push player (direction from player to hook) at speed (distance between hook and player/3)
17.                 if (y coordinate of hook-1) > (y coordinate of player):
18.                     push player upward at speed ((0.07000000000000001)*(difference between y coordinate of hook and y coordinate of player))
19.                 play raw sound "mob.zombie.infect" at player with pitch 2 volume 1
20.        
21.             else if "%fishing state%" = "failed attempt":
22.                 message "&cUnable to grapple"
23.            
24. on damage:
25.     if damage cause is fall:
26.         set damage to damage / 2
27.     if attacker's tool is a fishing rod named "&6Grapple":
28.         cancel event
29. on tool change:
30.     if player's tool is a fishing rod named "&6Grapple":
31.         message "&6Grapple detached"
32.         play raw sound "note.hat" at player with pitch 1 volume 1