Moving Sprites On Screen

Questions
1

I am trying to scroll move clouds across the screen. I keep an array of their positions and keep shifting it. When a cloud goes off the screen I remove it from the array and add it to the end of the array as a new cloud. However, my code is very jerky and glitchy. Could someone help me figure out why?


displayMode(FULLSCREEN)
supportedOrientations(PORTRAIT_ANY)

function setup()
    clouds = {}
    cloudsx = {}
    cloudsy = {}
end

function draw()
    background(160, 79, 79, 255)
   drawclouds()
end


function drawclouds()
    if clouds[1]==nil then
        
        --Generate Clouds
        for i=0,30 do
            c = math.random(0,2)
            x = WIDTH*1.1
            
            --Which Cloud
            clouds[i]=c
            --X position
            cloudsx[i]=x-200*i
            --y position
            cloudsy[i]=math.random(HEIGHT/1.65,HEIGHT/1.5)
       
        end
        
    end
        
    
    --draw clouds
    scale(1.35)
        print(cloudsx[1])
        for i=1,8 do
        
            --scroll cloud
            cloudsx[i]=cloudsx[i]-6
        
            --display different types of clouds
            if (clouds[i]==0)then
            sprite("Platformer Art:Cloud 1",cloudsx[i],cloudsy[i])
            end
             if (clouds[i]==1)then
            sprite("Platformer Art:Cloud 2",cloudsx[i],cloudsy[i])
            end
             if (clouds[i]==2)then
            sprite("Platformer Art:Cloud 3",cloudsx[i],cloudsy[i])
            end
        
        --find greatest x coordinate if a cloud
        gr=0
        for i=1,8 do
            if(cloudsx[i]>gr)then
                gr=cloudsx[i]
            end
        end
        --if a cloud is off the screen the make it follow the farers cloud to the rigt
             if(cloudsx[i]<-400 )then
                cloudsx[i]=gr+200
            end
        
     
  
    end
    scale(1/1.5)
        
        
end
2

Try taking the print statement out of draw

3

I discovered I created 30 sprites instead of 8 in the beginning which messed up my whole loop.

4

to avoid this kind of pb, this is a better way to code it:

for i=1,#clouds do