$1.$ Implement three different lighting patterns to $8$ LEDs on PORTB RB$0-$RB$7$: $(1)$ Blink $4$ LEDs ON and $4$

LEDs OFF and interchange to $4$ OFF and $4$ ON for $20(0$X$14)$ times, $(2)$ Blink every

other ON and every other OFF and interchange for $15(0$X$0$F$)$ times, $(3)$ Blink all $8$

LEDs ON and OFF for $5$ times.

$2.$ You must implement three different speeds: $(1)$ implement time delay of $1$ second

for pattern $1,(2)$ implement time delay of $0\mathrm{.}45$ second for pattern $2,(3)$ implement

time delay of any for pattern $3,$ but make sure it is visible.

$3.$ The system must run the patterns and blinking $($different time delays$)$ continuously

$($No GOTO $$).$