To overwrite the cryptocurrency mining program in the board's nand flash and check the basic functionality, you can program the binnaries to flash.
PL part : blink the red and green leds attched to W13 W14 alternately. PS part : print helloworld from uart1 on 24/25 pins in 5 seconds after boot.
Notice that the PL led blink clk is based on an active 50MHz crystal oscillator which needs you solder it manually together with several other hardware changes.There are solutions to PL clock source other than this, the source could be the 25MHz one beside the ethernet chip or PS core which needs configuration.
ARM_FPGA_bin folder contains PL blink and PS uart print binaries, while FPGA_bin only contains PL blink binaries.