Wokwi Arduino Simulatoruint8_t frame[8][2]; /* x : +ve right ; columns ; (0,15) * y : +ve down ; rows ; (1,8)*/ int8_t x=1, y=3, py=3, cy=3, dx=-1, dy=1; void spi_transfer(uint8_t data) { SPDR = data; while(!bitRead(SPSR, SPIF)); } void draw_frame()...