Code for when I using 2 fingers

Questions
1

Hi!
I am searching for a code which says that if you are using two fingers then… Something is happening

2

There is a multi touch demo program in the examples provided with Codea

3

Here is a program that says “2 Fingers Touching!” when the user is touching the screen with two fingers. It also displays in the top left corner how many fingers are touching the screen. If you don’t understand something in the code, I recommend looking it up because it’s very important to know how your code works.

-- Use this function to perform your initial setup
function setup()
    print("Touch the screen with two fingers")
    touchAmount = 0
end

-- This function gets called once every frame
function draw()
    -- This sets a dark background color 
    background(40, 40, 50)

    fill(255)
    fontSize(40)
    if touchAmount == 2 then -- If the amount of touches is two...
        text("Two Fingers Touching!",WIDTH/2,HEIGHT/2)
    end
    text("Fingers: "..touchAmount,100,HEIGHT-100)
end

function touched(touch)
    if touch.state == ENDED then
        touchAmount = touchAmount - 1 
        elseif touch.state == BEGAN then
        touchAmount = touchAmount + 1 
    end
end
4

Here’s some code that will draw a random colored line between your 2 fingers as you move them around the screen.

displayMode(FULLSCREEN)

function setup()
    tab={}
    stroke(255)
    strokeWidth(2)
    background(0)
    backingMode(RETAINED)
end

function draw()
    cnt=0
    for a,b in pairs(tab) do
        cnt=cnt+1
        if cnt==1 then
            x1,y1=b.x,b.y
        end
        if cnt==2 then
            stroke(math.random(255),math.random(255),math.random(255))
            line(x1,y1,b.x,b.y)
        end
    end
end

function touched(t)
    if t.state==BEGAN then
        tab[t.id]=vec2(t.x,t.y)
    end
    if t.state==MOVING then
        tab[t.id]=vec2(t.x,t.y)
    end
    if t.state==ENDED then
        tab[t.id]=nil
    end
end