can you make an explanation of this code in details

An Embedded C program Main Program int main (void) 1 unsigned int i; / LED variable * RCC->APB2ENR =(1UL3);/ Enable GPIOB clock * / GPIOB>CRH=033333333;/ PB.8..16 defined as Outputs */ While (1) {/ Loop forever */ for (i=1BRR=i;/ Turn LED off * / ) for (i=11>=1 ) }/ * Blink LED 7,6,5,4,3,2,1 * i > GPIOBBSRR=1; /TurnLED on * / wait (); / call wait function / GPIOBBRR=1;/TurnLED off */ 1