Renders all turtles of a given shape

def render(self, model, color, num_turtles):
        """Renders all turtles of a given shape"""
        self.program.bind()
        glBindVertexArray(self.vao)

        self.model_buffer.load(model.data, model.byte_size)
        self.color_buffer.load(color.data, color.byte_size)

        glDrawArraysInstanced(
            GL_TRIANGLES,
            0,
            len(self.geometry.edges) // 7,  # 7 = 4 for vertex, 3 for edge
            num_turtles
        )

        glBindVertexArray(0)
        self.program.unbind()