Please write a testbench code that simulates pressing two random number buttons once each, as well as pressing the left and right shift buttons once each. $```$

module LCD$\_$control Ier$($rst$,$ clk$,$ Icd$\_$e$,$ Icd$\_$rs$,$ Icd$\_$rw$,$ Icd$\_$data, led, number$\_$btn$,$ control$\_$btn$)$;

input rst$,$ clk:

input $[9$:$0]$ number$\_$btn;

input $[1$:$0]$ control$\_$btn;

wire $[9$:$0]$ number$\_$btn$\_$t:

wire $[1$:$0]$ control$\_$btn$\_$t:

oneshot$\_$universal #$(.$W$10$TH$(12))$ A$1($clk$,$ rst$,\{$number$\_$btn$[9$:$0],$ control$\_$btn$[1$:$0]\},\{$number$\_$btn$\_$t$[9$:$0],$ control$\_$btn$\_$t$[1$:$0]\})$;

output Icd$\_$e$,$ Icd$\_$rs$,$ Icd$\_$rw;

output reg $[7$:$0]$ Icd$\_$data;

output reg $[7$:$0]$ led;

wire Icd$\_$e:

reg Icd$\_$rs$,$ Icd$\_$rw;

reg $[7$:$0]$ cnt;

reg $[2$:$0]$ state;

parameter DELAY $=3\text{'}$b$000,$

FUNCTION$\_$SET $=3\text{'}$b$001,$

DISP$\_$ONOFF $=3\text{'}$b$010,$

ENTRY$\_$MODE $=3\text{'}$b$011,$

SET$\_$ADORESS $=3\text{'}$b$100,$

DELAY$\_$T $=3\text{'}$b$101,$

HRITE $=3\text{'}$b$110,$

CURSOR $=3\text{'}$b$111$;

always @$($posedge clk or negedge rst$)$

begin

if$(!$rst$)$ begin

state DELAY;

led b$0000\_0000$;

end

else begin

case$($state$)$

DELAY: begin

if$($cnt $==70)$ state FUNCTION$\_$SET;

led b$1000\_0000$;

end

$``````$

FUNCTION$\_$SET : begin

if$($cnt $==30)$ state DISP$\_$ONOFF;

led b$0100\_0000$;

end

DISP$\_$ONOFF : begin

if$($cnt $==30)$ state ENTRY$\_$MODE;

led b$0010\_0001$;

end

ENTRY$\_$MODE : begin

if$($cnt $==30)$ state SET$\_$ADDRESS;

led b$0001\_0000$;

end

SET$\_$ADORESS : begin

if$($cnt $==100)$ state DELAY$\_$T;

led b$0000\_1000$;

end

DELAY$\_$T : begin

state number$\_$btn$\_$t $?$ HRITE : $(|$control$\_$btn$\_$t $?$ CURSOR : DELAY$\_$T$)$;

led b$0000\_0100$;

end

WRITE : begin

if$($cnt $==30)$ state DELAY$\_$T;

led b$0000\_0010$;

end

CURSOR : begin

if$($cnt $==30)$ state DELAY$\_$T;

led b$0000\_0001$;

end

endcase

end

end

always @$($posedge clk or negedge rst$)$

begin

if$(!$rst$)$

cnt b$0000\_0000$;

else

begin

case$($state$)$

DELAY :

if$($cnt $>=70)$ cnt ;

else cnt cnt $+1$;

$``````$

FUNCTION$\_$SET :

if$($cnt $>=30)$ cnt ;

else cnt cnt $+1$;

DISP$\_$ONOFF :

if$($cnt $>=30)$ cnt ;

else cnt cnt $+1$;

ENTRY$\_$MODE :

if$($cnt $>=30)$ cnt ;

else cnt cnt $+1$;

SET$\_$ADORESS :

if$($cnt $>=100)$ cnt ;

else cnt cnt $+1$;

DELAY$\_$T :

cnt ;

mRITE:

if$($cnt $>=30)$ cnt ;

else cnt cnt $+1$;

CURSOR :

if$($cnt $>=30)$ cnt ;

else cnt cnt $+1$;

endcase

end

end

always @$($posedge clk or negedge rst$)$

begin

if$($lrst$)$

$\{|$cd$\_$rs$,$ Icd$\_$rw$,$ Icd$\_$datab$0\_0\_0000\_0001$;

else

begin

case$($state$)$

FUNCTION$\_$SET :

$\{$Icd$\_$rs$,$ Icd$\_$rw$,$ Icd$\_$datab$0\_0\_0011\_1000$;

DISP$\_$ONOFF :

$\{|$cd$\_$rs$,$ Icd$\_$rw$,$ Icd$\_$datab$0\_0\_0000\_1111$;

ENTRY$\_$MODE :

$\{$Icd$\_$rs$,$ Icd$\_$rw$,$ Icd$\_$datab$0\_0\_0000\_0110$;

SET$\_$ADORESS :

$\{$Icd$\_$rs$,$ Icd$\_$rw$,$ Icd$\_$datab$0\_0\_0000\_0010$;

DELAY$\_$T :

$\{$Icd$\_$rs$,$ Icd$\_$rw$,$ Icd$\_$datab$0\_0\_0000\_1111$;

HRITE: begin

$``````$

if$($cnt $=$ cov$)$ begin

case$($nunber$\_$bin$)$

$```$

$```$

$10\text{'}$b$0100\_0000\_00$ : $\backslash$lcd$\_$rs$,$ lod$\_$rw$,$ Icddatal s$=10\text{'}01\_0\_0011\_0010$;

$10\%$b$0010\_0000\_00$ : $($lcd$\_$rs$.$ lod$\_$rw$.$ Isd$\_$datab$1\_0\_0011\_0011$;

$10\text{'}$b$0001\_0000\_00($icdirs$,$ Icd$\_$r$\%,$ lcd$\_$data$)$ ce $10\text{'}$b$1\_0\_0011\_0100$:

$10\text{'}$b$0000\_1000\_00$ ;$./($icd$\_$rs$.$ Ecd$\_$ri#$,$ lcd$\_$data$)=10\text{'}$b$1\_0\_0011\_0101$;

$10\text{'}$b$0000\_0100\_00$ : $\{$Itd$\_$rs$,\{$cd$\_$r$\%,$ Icd$\_$data$\}$