Colour bars/Display

Colour bars/Display is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

The task is to display a series of colour bars across the width of the display. The colour bars should either utilize the system pallet, or the primary colours and black and white bars should also be included.

A typical colour bar sequence would be Black, Red, Green, Blue, Magenta, Cyan, Yellow, White

ZX Spectrum Basic

<lang basic> 10 REM The ZX Spectrum display is 32 columns wide, so we have 8 columns of 4 spaces 20 FOR r=0 TO 20: REM There are 21 rows 30 FOR c=0 TO 7: REM We use the native colour sequence here 40 PRINT " ";: REM four spaces, the semicolon prevents newline 50 NEXT c 60 REM at this point the cursor has wrapped, so we don't need a newline 70 NEXT r </lang>