def METHOD_NAME(self, data):
    feed_rate = self.getSettingValueByKey("park_feed_rate")
    park_print_head = self.getSettingValueByKey("park_print_head")
    x_park = self.getSettingValueByKey("head_park_x")
    y_park = self.getSettingValueByKey("head_park_y")
    trigger_command = self.getSettingValueByKey("trigger_command")
    pause_length = self.getSettingValueByKey("pause_length")
    retract = int(self.getSettingValueByKey("retract"))
    zhop = self.getSettingValueByKey("zhop")
    gcode_to_append = ";TimeLapse Begin\n"
    last_x = 0
    last_y = 0
    last_z = 0
    if park_print_head:
        gcode_to_append += self.putValue(G=1, F=feed_rate,
                                         X=x_park, Y=y_park) + " ;Park print head\n"
    gcode_to_append += self.putValue(M=400) + " ;Wait for moves to finish\n"
    gcode_to_append += trigger_command + " ;Snap Photo\n"
    gcode_to_append += self.putValue(G=4, P=pause_length) + " ;Wait for camera\n"
    for idx, layer in enumerate(data):
        for line in layer.split("\n"):
            if self.getValue(line, "G") in {0, 1}:  # Track X,Y,Z location.
                last_x = self.getValue(line, "X", last_x)
                last_y = self.getValue(line, "Y", last_y)
                last_z = self.getValue(line, "Z", last_z)
        # Check that a layer is being printed
        lines = layer.split("\n")
        for line in lines:
            if ";LAYER:" in line:
                if retract != 0: # Retract the filament so no stringing happens
                    layer += self.putValue(M=83) + " ;Extrude Relative\n"
                    layer += self.putValue(G=1, E=-retract, F=3000) + " ;Retract filament\n"
                    layer += self.putValue(M=82) + " ;Extrude Absolute\n"
                    layer += self.putValue(M=400) + " ;Wait for moves to finish\n" # Wait to fully retract before hopping
                if zhop != 0:
                    layer += self.putValue(G=1, Z=last_z+zhop, F=3000) + " ;Z-Hop\n"
                layer += gcode_to_append
                if zhop != 0:
                    layer += self.putValue(G=0, X=last_x, Y=last_y, Z=last_z) + "; Restore position \n"
                else:
                    layer += self.putValue(G=0, X=last_x, Y=last_y) + "; Restore position \n"
                if retract != 0:
                    layer += self.putValue(M=400) + " ;Wait for moves to finish\n"
                    layer += self.putValue(M=83) + " ;Extrude Relative\n"
                    layer += self.putValue(G=1, E=retract, F=3000) + " ;Retract filament\n"
                    layer += self.putValue(M=82) + " ;Extrude Absolute\n"
                data[idx] = layer
                break
    return data