Try this, too.

Code:

<font color="#000000"><b>.
..
...

</b><font color="#0000FF"><b>LED </b></font><font color="#000080"><b>VAR </b></font><font color="#0000FF"><b>PORTB</b></font><b>.</b><font color="#FF0000"><b>3
</b></font><font color="#0000FF"><b>Btn </b></font><font color="#000080"><b>VAR </b></font><font color="#0000FF"><b>PORTB</b></font><b>.</b><font color="#FF0000"><b>7

</b></font><font color="#0000FF"><b>LED </b></font><b>= </b><font color="#FF0000"><b>0

</b></font><font color="#0000FF"><b>Start</b></font><b>:

</b><font color="#000080"><b>IF </b></font><font color="#0000FF"><b>Btn </b></font><b>= </b><font color="#FF0000"><b>0 </b></font><font color="#000080"><b>THEN 
   WHILE </b></font><font color="#0000FF"><b>Btn </b></font><b>= </b><font color="#FF0000"><b>0 </b></font><b>: </b><font color="#000080"><b>WEND
   TOGGLE </b></font><font color="#0000FF"><b>LED
</b></font><font color="#000080"><b>ENDIF

GOTO </b></font><font color="#0000FF"><b>Start
</b></font>