How do I when a player clicks the item having a given speed?

Hi all, I'm still on one side of programming, so I created a menu and wanted to do to when you click on this item: He http://prntscr.com/c57br2 activate the speed the player, but I'm not able to do, I put the: p. setWallkSpeed (5); and does nothing, can you help me?

PS: Sorry for my English but I am Portuguese, I push myself to the maximum.

Code: http://prntscr.com/c57eem
Image Server: http://prntscr.com/c57eii

 

@ifreezptpt18
You can always add a potion effect of speed so when they click on it, they get like Speed V or something like that

 

Hello again,
But oh no more no way to do?

 

There's no problem, I just want to do like that but I'm not getting, and because also I know of to do it that way just that..

 

@ifreezptpt18
If you mean you do not know how to add potion effects, use this line:

Code:

Player p = the player
p.addPotionEffect(new PotionEffect(PotionEffectType type, int duration, int amplifier));
//Change type to SPEED
//change duration to 20*seconds (i.e 2 seconds = 40, 4 seconds = 80)
//change amplifier to  the power you want. Speed V = 5

 

Could you send me the code all please?

 

@ifreezptpt18
Nobody here is going to spoon-feed you code just because you don't want to do it, or don't know how. You have to learn how to do it!