# [Brain-Flak], 16 bytes

    (()){[(({}){})]}

[Try it online!][TIO-liakviax]

[Brain-Flak]: https://github.com/DJMcMayhem/Brain-Flak
[TIO-liakviax]: https://tio.run/##SypKzMzTTctJzP7/X0NDU7M6WkOjulYTiGJr////r5uYk5yTWFycmQwA "Brain-Flak – Try It Online"

    # Push a 1
    (())
    
    # While True...
    {
        # Print...
        [
            # Double the value on top of stack
            (({}){})
        ]
    }