Please help me do this LC$-3$ Assembly program. It is to be run through PENNSIM and the instructions are as follows. We must use at least $6$ subroutines. For this assignment, you will write a program that draws multiple color blocks on PennSim's graphic

display. The program user will be able to specify the location, pixel size, and color of $1-5$ blocks, which

will be displayed onto the graphics sereen. Afterwards, the user may select each block by number and

that block will be brought to the front of the display.

The learning objectives for this assignment are:

Use load and store instructions to manipulate the content of memory.

Acoept varying number of digits as inputs

Use advanced boundary checking

Interface with the LC$3$ Graphics Memory

Program Specification

The program must start at address $3000.$

The program prompt the user to enter the base coordinate $($top left$),$ color, and pixel count $(x$ by $x)$ for a

square box and will place this box on the screen. The use may select from $1$ to $5$ boxes, and the box

information must be retained after drawing it on the sereen. All entries for the box entry shall be echoed.

The PennSim graphics display $($the "screen"$)$ is $128$ by $124$ pixels. We use an $(x,y)$ coordinate system

to describe a location on the screen. Location $(0,0)$ is the top left corner. The $x$ coordinate increases as

we move to the right, and the $y$ coordinate increases as we move down. In other words, $(1,0)$ is one

pixel to the right of $(0,0),$ and location $(0,1)$ is one pixel below $(0,0).$ Location $(127,123)$ is the

bottom right comer of the screen. The boxes may NOT hang over the top, bottom, or side edges of the

graphics screen. If the coordinates are out of bounds for the chosen box size, an error message shall be

presented to the user and the box information re$-$prompted. The boxes are allowed to overlap each

other. While entering the box information the user shall use only integer values $0-127.$ Any other

character or number shall be ignored. The user should always press the ENTER key $($x$0$A$)$ to

signify their integer number is complete.

$$ The first prompt will be for the x coordinate of the box origin. Followed by ENTER.

$$ The second prompt will be for the y coordinate of the box origin. Followed by ENTER.

$$ The third prompt will be for the number of pixels on both the horizontal and vertical sides.

Followed by ENTER.

$$ The fourth prompt will be for the color and shall be a single letter representing the following

colors. Followed by ENTER.

Command

Character Action

r Set color to Red.

g Set color to Green.

b Set color to Blue.

y Set color to Yellow.

w Set color to White.

$$ This information MUST be saved in memory for each of the $5$ possible boxes.

$3$

$$ At any time if the user enters the character $$n$($next$)$ the program will stop requesting box data

and will proceed to the redisplay phase. The program will present the user the opportunity to

draw up to $5$ boxes. After this the program will automatically enter the redisplay phase.

$$ During the redisplay stage the prompt is shown to the user to select a box number $1-5.$ This box

is redrawn from memory on top of the other boxes. The ENTER key is not required here. This is

repeated until the user hits the $$q$$ quit key.

There are two additional commands:

Command

Character Action

c

Clear the screen.

Paint all pixels black. Program execution return to the start. Existing stored block data

is cleared.

q

Quit.

The program shall display a newline and message $$Thank you for playing$,$ then

HALT. The screen remains as it is$,$ it is not cleared.