diff --git a/For-developers-only/junk-file.py b/For-developers-only/junk-file.py
new file mode 100644
index 0000000..cc86e2d
--- /dev/null
+++ b/For-developers-only/junk-file.py
@@ -0,0 +1,180 @@
+import epdif
+from PIL import Image
+import RPi.GPIO as GPIO
+
+# Display resolution
+EPD_WIDTH       = 640
+EPD_HEIGHT      = 384
+
+# EPD7IN5 commands
+PANEL_SETTING                               = 0x00
+POWER_SETTING                               = 0x01
+POWER_OFF                                   = 0x02
+POWER_OFF_SEQUENCE_SETTING                  = 0x03
+POWER_ON                                    = 0x04
+POWER_ON_MEASURE                            = 0x05
+BOOSTER_SOFT_START                          = 0x06
+DEEP_SLEEP                                  = 0x07
+DATA_START_TRANSMISSION_1                   = 0x10
+DATA_STOP                                   = 0x11
+DISPLAY_REFRESH                             = 0x12
+IMAGE_PROCESS                               = 0x13
+LUT_FOR_VCOM                                = 0x20
+LUT_BLUE                                    = 0x21
+LUT_WHITE                                   = 0x22
+LUT_GRAY_1                                  = 0x23
+LUT_GRAY_2                                  = 0x24
+LUT_RED_0                                   = 0x25
+LUT_RED_1                                   = 0x26
+LUT_RED_2                                   = 0x27
+LUT_RED_3                                   = 0x28
+LUT_XON                                     = 0x29
+PLL_CONTROL                                 = 0x30
+TEMPERATURE_SENSOR_COMMAND                  = 0x40
+TEMPERATURE_CALIBRATION                     = 0x41
+TEMPERATURE_SENSOR_WRITE                    = 0x42
+TEMPERATURE_SENSOR_READ                     = 0x43
+VCOM_AND_DATA_INTERVAL_SETTING              = 0x50
+LOW_POWER_DETECTION                         = 0x51
+TCON_SETTING                                = 0x60
+TCON_RESOLUTION                             = 0x61
+SPI_FLASH_CONTROL                           = 0x65
+REVISION                                    = 0x70
+GET_STATUS                                  = 0x71
+AUTO_MEASUREMENT_VCOM                       = 0x80
+READ_VCOM_VALUE                             = 0x81
+VCM_DC_SETTING                              = 0x82
+
+class EPD:
+    def __init__(self):
+        self.reset_pin = epdif.RST_PIN
+        self.dc_pin = epdif.DC_PIN
+        self.busy_pin = epdif.BUSY_PIN
+        self.width = EPD_WIDTH
+        self.height = EPD_HEIGHT
+
+    def digital_write(self, pin, value):
+        epdif.epd_digital_write(pin, value)
+
+    def digital_read(self, pin):
+        return epdif.epd_digital_read(pin)
+
+    def delay_ms(self, delaytime):
+        epdif.epd_delay_ms(delaytime)
+
+    def send_command(self, command):
+        self.digital_write(self.dc_pin, GPIO.LOW)
+        # the parameter type is list but not int
+        # so use [command] instead of command
+        epdif.spi_transfer([command])
+
+    def send_data(self, data):
+        self.digital_write(self.dc_pin, GPIO.HIGH)
+        # the parameter type is list but not int
+        # so use [data] instead of data
+        epdif.spi_transfer([data])
+
+    def init(self):
+        if (epdif.epd_init() != 0):
+            return -1
+        self.reset()
+
+        self.send_command(POWER_SETTING)
+        self.send_data(0x37)
+        self.send_data(0x00)
+
+        self.send_command(PANEL_SETTING)
+        self.send_data(0xCF)
+        self.send_data(0x08)
+
+        self.send_command(BOOSTER_SOFT_START)
+        self.send_data(0xc7)
+        self.send_data(0xcc)
+        self.send_data(0x28)
+
+        self.send_command(POWER_ON)
+        self.wait_until_idle()
+
+        self.send_command(PLL_CONTROL)
+        self.send_data(0x3c)
+
+        self.send_command(TEMPERATURE_CALIBRATION)
+        self.send_data(0x00)
+
+        self.send_command(VCOM_AND_DATA_INTERVAL_SETTING)
+        self.send_data(0x77)
+
+        self.send_command(TCON_SETTING)
+        self.send_data(0x22)
+
+        self.send_command(TCON_RESOLUTION)
+        self.send_data(0x02)     #source 640
+        self.send_data(0x80)
+        self.send_data(0x01)     #gate 384
+        self.send_data(0x80)
+
+        self.send_command(VCM_DC_SETTING)
+        self.send_data(0x1E)      #decide by LUT file
+
+        self.send_command(0xe5)           #FLASH MODE
+        self.send_data(0x03)
+
+    def wait_until_idle(self):
+        while(self.digital_read(self.busy_pin) == 0):      # 0: busy, 1: idle
+            self.delay_ms(100)
+
+    def reset(self):
+        self.digital_write(self.reset_pin, GPIO.LOW)         # module reset
+        self.delay_ms(200)
+        self.digital_write(self.reset_pin, GPIO.HIGH)
+        self.delay_ms(200)    
+
+    def get_frame_buffer(self, image):
+        buf = [0x00] * int(self.width * self.height / 8)
+        # Set buffer to value of Python Imaging Library image.
+        # Image must be in mode 1.
+        image_monocolor = image.convert('1')
+        imwidth, imheight = image_monocolor.size
+        if imwidth != self.width or imheight != self.height:
+            raise ValueError('Image must be same dimensions as display \
+                ({0}x{1}).' .format(self.width, self.height))
+
+        pixels = image_monocolor.load()
+        for y in range(self.height):
+            for x in range(self.width):
+                # Set the bits for the column of pixels at the current position.
+                if pixels[x, y] != 0:
+                    buf[int((x + y * self.width) / 8)] |= 0x80 >> (x % 8)
+        return buf
+
+    def display_frame(self, frame_buffer):
+        self.send_command(DATA_START_TRANSMISSION_1)
+        for i in range(0, 30720):
+            temp1 = frame_buffer[i]
+            j = 0
+            while (j < 8):
+                if(temp1 & 0x80):
+                    temp2 = 0x03
+                else:
+                    temp2 = 0x00
+                temp2 = (temp2 << 4) & 0xFF
+                temp1 = (temp1 << 1) & 0xFF
+                j += 1
+                if(temp1 & 0x80):
+                    temp2 |= 0x03
+                else:
+                    temp2 |= 0x00
+                temp1 = (temp1 << 1) & 0xFF
+                self.send_data(temp2)
+                j += 1
+        self.send_command(DISPLAY_REFRESH)
+        self.delay_ms(100)
+        self.wait_until_idle()
+
+    def sleep(self):
+        self.send_command(POWER_OFF)
+        self.wait_until_idle()
+        self.send_command(DEEP_SLEEP)
+        self.send_data(0xa5)
+
+### END OF FILE ###