STM32F103C8 (bluepill) with libopencm3 controlling a ssd1306 display (128x64) to show some BadApple.
This works with fake stm32f103c8 from aliexpress, they are 128kb instead of 64. But this will work with stm32f103cB
You can use just make without bear.
$ sudo apt-get install stlink-tools bear gcc-arm-none-eabi
$ git clone --recurse-submodules https://github.com/bonmas14/stm32-ssd1306-BadApple.git
$ cd stm32-ssd*/libopencm3
$ make
$ cd ../ssd*
$ bear -- make
$ st-flash --reset write badapple.bin 0x8000000