Need help making code more efficient

[dhbergen]

Larz60+, I have tried what you have suggested and have received an error. I type in the following:

def setup():
    size(400, 400)
    
def draw():
    import time
 
    def display_this(my_string):
        cur_str = []
        for character in my_string:
            cur_str.append(character)
            text(cur_str, 10, 30)
            time.sleep(.5)
    
    display_this('this is a test.')

and recieve

Error:
processing.app.SketchException: TypeError: a float is required
	at jycessing.mode.run.SketchRunner.convertPythonSketchError(SketchRunner.java:252)
	at jycessing.mode.run.SketchRunner.lambda$2(SketchRunner.java:125)
	at java.lang.Thread.run(Thread.java:748)