Vt

This system module defines some special strings which, when printed on a VT100 or compatible terminal window, cause special things to happen: clear the screen, move the cursor, turn bold text on/off, etc.

Functions

Name	Description
textColor(color)	Sets the foreground color of the text. Specify a single number (index into the 256-color palette), or an [r,g,b] (each 255) list, or a RGB color string like "#FF8800". (In the latter two cases, we will automatically find as close match as we can in the color palette.)
backColor(color)	Sets the background color of the text. Specify a single number (index into the 256-color palette), or an [r,g,b] (each 255) list, or a RGB color string like "#FF8800". (In the latter two cases, we will automatically find as close match as we can in the color palette.)
ledOn(n=1)	Turns on LEDs, if your terminal has these (most don't anymore)
ledOff	Turns off LEDS. Same as calling ledOn(0).

Properties

color

Map of color names (to palete index) for use with textColor and backColor. But note that you are not limited to these colors! See notes above.

Name	Value
color.aqua	51
color.black	232
color.blue	21
color.brown	137
color.fuchsia	201
color.gray	244
color.green	34
color.lime	46
color.maroon	124
color.navy	19
color.olive	142
color.orange	214
color.pink	217
color.purple	127
color.red	196
color.silver	250
color.teal	37
color.white	255
color.yellow	226

cursor

A map of cursor movement escape codes

Name	Description
cursor.up(n=1)	Moves cursor up n lines
cursor.down(n=1)	Moves cursor down n lines
cursor.left(n=1)	Moves cursor left n characters
cursor.right(n=1)	Moves cursor right n characters
cursor.nextLine	Moves cursor to beginning of the next line of characters
cursor.home	Moves cursor to upper left
cursor.save	Saves cursor position and attributes
cursor.restore	Restores cursor position and attributes

tab

A map of tab escape codes

Name	Description
tab.set	Sets a tab stop at the current column
tab.clear	Clear a tab stop at the current column
tab.clearAll	Clears all tab stops

text size

Escape codes for changing the text size

Name	Description
bigTextTop	big text! Requires printing your message twice, once with the "top half" mode
bigTextBottom	and again with the "bottom half".
wide	or you can print double-wide, normal-height text.
normalSize	Turns off any of these size changes.

clearing text

Escape codes to clear all or part of the screen

Name	Description
clear	Clear entire screen
clearLineToRight	Clear line from cursor right
clearLineToLeft	Clear line from cursor left
clearLine	Clear entire line
clearBelow	Clear screen from cursor down
clearAbove	Clear screen from cursor up
reset	Clears, plus also resets all state