Editing Vilnius BASIC (section)

===Graphics additions===
The Electronica systems included [[Computer graphics|computer graphic]]s support, and Vilnius BASIC included a number of statements to work with graphics. One interesting feature of this system was that X,Y coordinates were written in parens. The system remembered the last specified point, and new locations could be indicated with the {{code|@}}, for instance, if the last draw command was at (100,100), one could turn the pixel at (105,105) to color 3 with {{code|PSET @(5,5),3}}. There were five color values, 0 through 3.

In addition to {{code|PSET}}, one could draw lines from-to using a pair of coordinates separated by a minus sign, similar to the LIST command, for instance {{code|LINE (100,100)-(120,120),3}}. In its simplest form, {{code|CIRCLE}} took an X,Y pair for the center, a radius, and a color, {{code|CIRCLE (120,120),30,1}}. It could also plot arcs from given start and end angles in radians, {{code|CIRCLE (120,120),30,1,0,1.5}}, and could "compress" the vertical axis to produce an ellipse, {{code|CIRCLE (100,100),20,1,,,0.4}}. {{code|PAINT (100,100),3,1}} performed a [[flood fill]] starting at (100,100), filling with color 3 and moving outward until it saw color 1.

Finally, there was the multi-purpose {{code|DRAW}} command. This took a string which encoded a series of drawing steps that could produce a complex shape in a single line of code. The four cardinal directions were indicated with U, D, L and R (up, down, left, right). The 45-degree angles were, moving clockwise, E (up-right), F, G and H (up-left). For instance, {{code|DRAW "R20D20L20U20"}} would produce a square with sides 20 pixels long starting at the last drawn position. In addition to directions, the M command could be used to specify explicit coordinates, like "M100,120", which did not require the parens. C changes the color, B moves without drawing a line, and N resets the coordinates to what they were before the DRAW command.

There is a single graphics function, {{code|POINT(x,y)}}, which returns the number of the color of that location on the screen.