Constructor
new CountdownForm(count)
    Creates the form with font size 128.
    Parameters:
| Name | Type | Description | 
|---|---|---|
| count | number | number to start counting from | 
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Classes
Methods
dispose()
    Clean up, also removes the HUD row and shows buttons.
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init()
    Initialize and display the form.
Hides HUD buttons, adds new HUD row, adds the form to the HUD, 
and positions it at the center of the screen.
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update(count)
    Update the count
    Parameters:
| Name | Type | Description | 
|---|---|---|
| count | number | set new displayed value | 
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