from stimulus import Paradigm, Text, WaitForKey, Pause    

# Initialize a paradigm
par = Paradigm(window_dimensions=(720, 480))
# Create a list of stimuli in the order they will show up
# Each stimuli is added as a tuple of the form (StimulusClass, (arguments))
stimuli = [
            (Text, ('This text will disappear in 5 seconds. '
                    'Then press the "c" key to continue ', 5.0)),
            (WaitForKey, (['c'], 'continue')),
            (Text, ("Here's some more text", )),  # duration defaults to 2 sec
            # You can also specify keyword arguments in a dictionary
            (Text, 
                {'text': 'This text will display for 5 seconds',
                'duration': 5.0}),
            (Text, ('Nice! There will be a 2 second pause '
                    'after this disappears, then an exit.', 4.0)),
            (Pause, (2,))
         ]
par.add_stimuli(stimuli)  # Add the stimuli
par.play_all() # Play all stimuli

from psychopy import core, visual
from stimulus import Stimulus, Paradigm

class HelloWorldStim(Stimulus):
    """A stimulus that just shows "Hello, World!" in green."""
    def __init__(self, window, duration=2.0, *args, **kwargs):
        self.window = window
        self.text = visual.TextStim(self.window, 
                        text="Hello, World!", color="Green",
                        *args, **kwargs)
        self.duration = duration

    def show(self):
        self.text.draw()
        self.window.flip()
        core.wait(self.duration)

# Now you can use it!
par = Paradigm()
hello = (HelloWorldStim, (5.0,))
par.add_stimulus(hello)
par.play_all()