3 codes need.

[Admigo]

Dear Mta Scripters,

I need 3 codes for this rocket shooting code:

addCommandHandler("boom",function() 
local occupiedVehicle = getPedOccupiedVehicle(getLocalPlayer()) 
local x, y, z = getElementPosition(occupiedVehicle) 
local matrix = getElementMatrix(occupiedVehicle) 
local offX = 0 * matrix[1][1] + 1 * matrix[2][1] + 0 * matrix[3][1] + 1 * matrix[4][1] 
local offY = 0 * matrix[1][2] + 1 * matrix[2][2] + 0 * matrix[3][2] + 1 * matrix[4][2] 
local offZ = 0 * matrix[1][3] + 1 * matrix[2][3] + 0 * matrix[3][3] + 1 * matrix[4][3] 
vx = offX - x 
vy = offY - y 
vz = offZ - z 
local rotx, roty, rotz = getElementRotation(occupiedVehicle) 
createProjectile(getLocalPlayer(), 19, x, y, z+1, 500, nil, 0, 0, 360 - rotz, vx, vy, vz) 
end) 

1.How can i change this command into a key(that i need to press left button to shoot)

2.How can i only use this command(key) every 4 seconds?

3.How can i change the distance of the rocket(that the rocket can shoot a long distance)

I hope someone help me with this.

Thanks Admigo

[Castillo]

canShoot = true 
  
bindKey("M","down",function() 
if (not canShoot) then return end 
local occupiedVehicle = getPedOccupiedVehicle(getLocalPlayer()) 
local x, y, z = getElementPosition(occupiedVehicle) 
local matrix = getElementMatrix(occupiedVehicle) 
local offX = 0 * matrix[1][1] + 1 * matrix[2][1] + 0 * matrix[3][1] + 1 * matrix[4][1] 
local offY = 0 * matrix[1][2] + 1 * matrix[2][2] + 0 * matrix[3][2] + 1 * matrix[4][2] 
local offZ = 0 * matrix[1][3] + 1 * matrix[2][3] + 0 * matrix[3][3] + 1 * matrix[4][3] 
vx = offX - x 
vy = offY - y 
vz = offZ - z 
local rotx, roty, rotz = getElementRotation(occupiedVehicle) 
createProjectile(getLocalPlayer(), 19, x, y, z+1, 500, nil, 0, 0, 360 - rotz, vx, vy, vz) 
canShoot = false 
setTimer(function () canShoot = true end, 4000, 1) 
end) 

About third question, I don't get it.