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Here is my test case:

from scene import Scene, SpriteNode, run, Point

class pt(SpriteNode):

    def __init__(self, **kargs):
        SpriteNode.__init__(self, 'plf:HudX', **kargs)

    scale_x = 0.5
    scale_y = 0.5

class plot (SpriteNode):
    anchor_point = Point(0,0)
    color = '#8989ff'

class test(Scene):

    def setup(self):
        pane = plot(parent=self)
        pane.size = (self.size.x / 2, self.size.y / 2)
        pane.position = (50,50)

        for x in (50, 100, 150, 200, 250, 300):
            p = pt(parent=pane)
            p.position = (x, x)

if __name__ == '__main__':
    tst = test()
    run(tst)

Questions:
1. Why doesn't the color work on my plot class?
2. Why isn't the plot 50 px from the lower left corner?
3. Why are the x gifs not half size?
4. Why doesn't the plot Sprite clip its children?

1. Why doesn't the color work on my plot class?

You're not setting color as an instance attribute, but the color class attribute you're creating "shadows" the normal property. You should set color and anchor_point in an __init__ method, as you've done (in part) with the pt class.

It should look roughly like this:

class plot (SpriteNode):
    def __init__(self, **kargs):
        SpriteNode.__init__(self, **kargs)
        self.anchor_point = (0, 0)
        self.color = '#8989ff'

1. Why isn't the plot 50 px from the lower left corner?

Basically the same answer as for the previous question, the anchor_point had no effect in your code.

1. Why are the x gifs not half size?

First of all, the attributes you're looking for are called x_scale and y_scale, not scale_x and scale_y. Furthermore, if you set both to the same value anyway, you can just use scale.

1. Why doesn't the plot Sprite clip its children?

Because that's just the way sprite nodes behave. Almost no kind of node clips its children. You could use an EffectNode with the crop_rect property set for this purpose though, if you really need clipping behavior.

Got it. There is setter code in the library and I was overriding it. Here is the fixed code:

```
from scene import Scene, SpriteNode, run, EffectNode

class pt(SpriteNode):

def __init__(self, **kargs):
    SpriteNode.__init__(self, 'plf:HudX', **kargs)
    self.scale = 0.5

class plot (SpriteNode):
def init(self, kargs):
SpriteNode.init(self, kargs)
self.anchor_point = (0, 0)
self.color = '#8989ff'

class test(Scene):

def setup(self):
    clip = EffectNode(parent=self)
    clip.crop_rect = (0, 0, self.size.x / 2, self.size.y / 2)
    pane = plot(parent=clip)
    pane.size = (self.size.x / 2, self.size.y / 2)
    clip.position = (50, 50)

    for x in (50, 100, 150, 200, 250, 300, 350, 400):
        p = pt(parent=pane)
        p.position = (x, x)

if name == 'main':
tst = test()
run(tst)

    ```