Arduino for STM32

Its a very basic board really, only runs some ws2812 leds thats all. Ok I see, so I should be good with the xtals i have. Thank you very much for the explanation it helped me alot as i had no idea how to go on about it

Hey guys, I'm a newbie at designing boards and wanted to create my own stm32 board to be used with stm32duino core with arduino.
I started with copying bluepill schematic and created a custom board and it works ok.
The F103C8 is just too much for what I need and looking at F030C8 is looking better ...