try:

Locate 4,4,"some text"
0->K
While K=0
Getkey -> K
If K=79
Then ClrText
WhileEnd

Trying that gave me a syntax error on the last line... 

IT WORKED! haha. Thank you for answering that simple question 

That looks almost JUST like TI BASIC!

They are similar, but I really feel TI-BASIC is the better programming language because of the ability to wrap strings around the screen, having the ability to check a certain part of a string (Casio-BASIC would need to extract the symbol from the string, store it into a seperate string and compare it with the comparison string) and the ability to use HEX codes to generate icons. Especially the last function got me jealous of TI-calc owners The fastest method of drawing a sprite on CASIO is storing the coordinates of the pixels into two lists and drawing them all using Scatter,List 1,List 2 (also with some other things before and after it I can't remember) and changing the V-Window settings to move the sprite around.

They are similar, but I really feel TI-BASIC is the better programming language because of the ability to wrap strings around the screen

You can do that in a complicated fashion with the quotation marks (e.g. "String that is more than 21 characters long").  Just not with Locate.

... having the ability to check a certain part of a string (Casio-BASIC would need to extract the symbol from the string, store it into a seperate string and compare it with the comparison string

That is what StrCmp( is for.  Actually, I'm not quite sure what you mean here.

I find myself more challenged by Casio Basic.  It does seem a little bit more awkward sometimes.

What I have done several times for such a situation is
StrCmp(StrMid(Str #,<index>,<length>),"String")=0Where "String" is whatever I am testing for (either a string # or something like "A").  This would combine all of the steps and run much faster.  It is somewhat of a handful but it works.

I used to program some casio basic so here i can tell you (ps: it was for a 9850, should also work for 9860
eg for a 4x4 matrix: (EDITTED)  [[0,0,0,1][0,0,1,0][0,1,0,0][1,0,0,0]]-> Mat A
would create the matrix:
0 0 0 1
0 0 1 0
0 1 0 0
1 0 0 0

There is an additional square bracket at the beginning that is necessary.  In Jonius7's example it would start like [[0,0,0,1][0,0 ...
Also, pokemonrules9 do you know about the variables theta and r?  It took me a while to realize I could use them in programs and having those additional two can be useful.

Oh yes, i've forgotten about that. I've forgotten quite a lot of casio basic i once knew.
The way I learned Casio BASIC was to look at other people's games. I would download the cat file for 9850 and  open it in a word document. the code to type was readable. and i had to type it manually anyway, as i had no link cable. So when I typed Sean Tan's Star Wars game (about 20000 bytes) I managed to reduced it by 4000 bytes or so by using a list instead of a one column matrix.