def METHOD_NAME(self):
    file = open("example.glsl")
    shader_sourcecode = file.read()
    size = self.width, self.height
    self.shadertoy = Shadertoy(size, shader_sourcecode)
    self.channel0 = self.shadertoy.ctx.framebuffer(
        color_attachments=[self.shadertoy.ctx.texture(size, components=4)]
    )
    self.shadertoy.channel_0 = self.channel0.color_attachments[0]
    self.channel1 = self.shadertoy.ctx.framebuffer(
        color_attachments=[self.shadertoy.ctx.texture(size, components=4)]
    )
    self.shadertoy.channel_1 = self.channel1.color_attachments[0]