tell application "QuickTime Player"


    try

        set doc1 to document 1
        set doc2 to document 2
        set doc3 to document 3
        set doc4 to document 4
        set doc5 to document 5
        set doc6 to document 6
        set doc7 to document 7
        set doc8 to document 8
        set doc9 to document 9
        set doc10 to document 10
        set doc11 to document 11
        set doc12 to document 12
    end try

    try
        set presenting of doc1 to true
        delay 5
        set presenting of doc2 to true
        delay 5
        set presenting of doc3 to true
        delay 5
        set presenting of doc4 to true
        delay 5
        set presenting of doc5 to true
        delay 5
        set presenting of doc6 to true
        delay 5
        set presenting of doc7 to true
        delay 5
        set presenting of doc8 to true
        delay 5
        set presenting of doc9 to true
        delay 5
        set presenting of doc10 to true
        delay 5
        set presenting of doc11 to true
        delay 5
        set presenting of doc12 to true
        delay 5




        set presenting of doc1 to false
        delay 5
        set presenting of doc2 to false
        delay 5
        set presenting of doc3 to false
        delay 5
        set presenting of doc4 to false
        delay 5
        set presenting of doc5 to false
        delay 5
        set presenting of doc6 to false
        delay 5
        set presenting of doc7 to false
        delay 5
        set presenting of doc8 to false
        delay 5
        set presenting of doc9 to false
        delay 5
        set presenting of doc10 to false
        delay 5
        set presenting of doc11 to false
        delay 5
        set presenting of doc12 to false
        delay 5

    end try


end tell