diff --git a/RebundDemo/CMakeLists.txt b/RebundDemo/CMakeLists.txt
new file mode 100644
index 0000000..2aa16fe
--- /dev/null
+++ b/RebundDemo/CMakeLists.txt
@@ -0,0 +1,8 @@
+# The following lines of boilerplate have to be in your project's CMakeLists
+# in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+set(EXTRA_COMPONENT_DIRS ../components/ssd1306)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(ssd1306)
diff --git a/RebundDemo/README.md b/RebundDemo/README.md
new file mode 100644
index 0000000..6af2023
--- /dev/null
+++ b/RebundDemo/README.md
@@ -0,0 +1,2 @@
+# ReboundDemo for SSD1306
+
diff --git a/RebundDemo/main/CMakeLists.txt b/RebundDemo/main/CMakeLists.txt
new file mode 100644
index 0000000..647a294
--- /dev/null
+++ b/RebundDemo/main/CMakeLists.txt
@@ -0,0 +1,4 @@
+set(COMPONENT_SRCS "main.c")
+set(COMPONENT_ADD_INCLUDEDIRS "")
+
+register_component()
diff --git a/RebundDemo/main/component.mk b/RebundDemo/main/component.mk
new file mode 100644
index 0000000..61f8990
--- /dev/null
+++ b/RebundDemo/main/component.mk
@@ -0,0 +1,8 @@
+#
+# Main component makefile.
+#
+# This Makefile can be left empty. By default, it will take the sources in the 
+# src/ directory, compile them and link them into lib(subdirectory_name).a 
+# in the build directory. This behaviour is entirely configurable,
+# please read the ESP-IDF documents if you need to do this.
+#
diff --git a/RebundDemo/main/main.c b/RebundDemo/main/main.c
new file mode 100644
index 0000000..d929fc0
--- /dev/null
+++ b/RebundDemo/main/main.c
@@ -0,0 +1,101 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <inttypes.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_random.h"
+#include "esp_log.h"
+
+#include "ssd1306.h"
+
+/*
+ You have to set this config value with menuconfig
+ CONFIG_INTERFACE
+
+ for i2c
+ CONFIG_MODEL
+ CONFIG_SDA_GPIO
+ CONFIG_SCL_GPIO
+ CONFIG_RESET_GPIO
+
+ for SPI
+ CONFIG_CS_GPIO
+ CONFIG_DC_GPIO
+ CONFIG_RESET_GPIO
+*/
+
+#define tag "SSD1306"
+
+void app_main(void)
+{
+	SSD1306_t dev;
+
+#if CONFIG_I2C_INTERFACE
+	ESP_LOGI(tag, "INTERFACE is i2c");
+	ESP_LOGI(tag, "CONFIG_SDA_GPIO=%d",CONFIG_SDA_GPIO);
+	ESP_LOGI(tag, "CONFIG_SCL_GPIO=%d",CONFIG_SCL_GPIO);
+	ESP_LOGI(tag, "CONFIG_RESET_GPIO=%d",CONFIG_RESET_GPIO);
+	i2c_master_init(&dev, CONFIG_SDA_GPIO, CONFIG_SCL_GPIO, CONFIG_RESET_GPIO);
+#endif // CONFIG_I2C_INTERFACE
+
+#if CONFIG_SPI_INTERFACE
+	ESP_LOGI(tag, "INTERFACE is SPI");
+	ESP_LOGI(tag, "CONFIG_MOSI_GPIO=%d",CONFIG_MOSI_GPIO);
+	ESP_LOGI(tag, "CONFIG_SCLK_GPIO=%d",CONFIG_SCLK_GPIO);
+	ESP_LOGI(tag, "CONFIG_CS_GPIO=%d",CONFIG_CS_GPIO);
+	ESP_LOGI(tag, "CONFIG_DC_GPIO=%d",CONFIG_DC_GPIO);
+	ESP_LOGI(tag, "CONFIG_RESET_GPIO=%d",CONFIG_RESET_GPIO);
+	spi_master_init(&dev, CONFIG_MOSI_GPIO, CONFIG_SCLK_GPIO, CONFIG_CS_GPIO, CONFIG_DC_GPIO, CONFIG_RESET_GPIO);
+#endif // CONFIG_SPI_INTERFACE
+
+#if CONFIG_SSD1306_128x64
+	ESP_LOGI(tag, "Panel is 128x64");
+	ssd1306_init(&dev, 128, 64);
+	int xmax = 127;
+	int ymax = 63;
+#endif // CONFIG_SSD1306_128x64
+#if CONFIG_SSD1306_128x32
+	ESP_LOGI(tag, "Panel is 128x32");
+	ssd1306_init(&dev, 128, 32);
+	int xmax = 127;
+	int ymax = 31;
+#endif // CONFIG_SSD1306_128x32
+
+	int radius = 4;
+	uint32_t xrand = esp_random();
+	uint32_t yrand = esp_random();
+	ESP_LOGD(tag, "xrand=%"PRIu32" yrand=%"PRIu32, xrand, yrand);
+	//int x_current = 10;
+	//int y_current = 10;
+	int x_current = xrand % xmax;
+	int y_current = yrand % ymax;
+	ESP_LOGD(tag, "x_current=%d", x_current);
+	ESP_LOGD(tag, "y_current=%d", y_current);
+	int x_previus = x_current;
+	int y_previus = y_current;
+	int x_direction = 1;
+	int y_direction = 1;
+	ssd1306_clear_screen(&dev, false);
+	ssd1306_contrast(&dev, 0xff);
+
+	while(1) {
+		_ssd1306_circle(&dev, x_previus, y_previus, radius, true);
+		_ssd1306_circle(&dev, x_current, y_current, radius, false);
+		ssd1306_show_buffer(&dev);
+		x_previus = x_current;
+		y_previus = y_current;
+		x_current = x_current + x_direction;
+		y_current = y_current + y_direction;
+		if ( (x_current + radius) >= xmax) {
+			x_direction = -1;
+		} else if ( (x_current - radius) <= 0) {
+			x_direction = 1;
+		} else if ( (y_current + radius) >= ymax) {
+			y_direction = -1;
+		} else if ( (y_current - radius) <= 0) {
+			y_direction = 1;
+		}
+		vTaskDelay(1);
+	}
+}
diff --git a/RebundDemo/sdkconfig.defaults b/RebundDemo/sdkconfig.defaults
new file mode 100644
index 0000000..27d6f75
--- /dev/null
+++ b/RebundDemo/sdkconfig.defaults
@@ -0,0 +1,18 @@
+#
+# ESP32-specific
+#
+CONFIG_ESP32_DEFAULT_CPU_FREQ_240=y
+CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ=240
+
+#
+# ESP32S2-specific
+#
+CONFIG_ESP32S2_DEFAULT_CPU_FREQ_240=y
+CONFIG_ESP32S2_DEFAULT_CPU_FREQ_MHZ=240
+
+#
+# ESP32S3-specific
+#
+CONFIG_ESP32S3_DEFAULT_CPU_FREQ_240=y
+CONFIG_ESP32S3_DEFAULT_CPU_FREQ_MHZ=240
+