local airplane
local crate
local airon = false
local c
 
local function spawnair ()
        airplane =  display.newImage ( "Airplane.png" )
        airplane:setReferencePoint ( display.TopCenterReferencePoint )
        airplane.x = -50
        airplane.y = 50
        airon = true
        c = mRandom ( 150, 460 )
end
timer.performWithDelay ( 4000, spawnair, 0 )
 
local function cra ()
        if ( gameplay == true and airon == true ) then
                if ( airplane.x == c ) then
                crate = display.newImage ( "Crate.png" )
                crate:setReferencePoint ( display.TopCenterReferencePoint )
                crate.x = airplane.x
                crate.y = 70
                physics.addBody ( crate )
                end
        end
end
 
Runtime:addEventListener ( "enterFrame", cra )
 
local function air ()
        if ( gameplay == true and airon == true ) then
        airplane.x = airplane.x + 10
        end
end
 
Runtime:addEventListener ( "enterFrame", air )
 
local function remair ()
        if ( gameplay == true and airon == true and airplane.x == 530 ) then
        airplane:removeSelf ()
        airplane = nil
        airon = false
        end
end