165            if len(self.value) > 0:
166                self.value = self.value[:-1]
167                self.draw_text(self.value, center=True)
168        # replace value with input value if enter or return is pressed and value is a float169        elif key in ("return", "enter"):
170            if self.value != "" and EzUtils.is_float(self.value):
171                self.input_value = float(self.value)

116                    break
117                num_iter += 1
118
119            # define the color based on the number of iterations and set the pixel color in the screen array120            screen_array[x, y] = iter_gradient_generator(
121                num_iter, max_iter, saturation, lightness
122            )

107            # define the initial value of z and the number of iterations
108            z = 0
109            num_iter = 0
110            # iterate the function until the number is diverging or the max iterations is reached111            for i in range(max_iter):
112                # julia set formula
113                z = z ** 2 + c

 79                    break
 80                num_iter += 1
 81
 82            # define the color based on the number of iterations and set the pixel color in the screen array 83            screen_array[x, y] = iter_gradient_generator(
 84                num_iter, max_iter, saturation, lightness
 85            )

 70            # number of iterations
 71            num_iter = 0
 72
 73            # iterate the function until the number is diverging or the max iterations is reached 74            for i in range(max_iter):
 75                # julia set formula
 76                z = z ** 2 + c