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...His later version of Karel the Robot in 3D, created first in the Slovak Republic.
JavaScript variant include only one small HTML file tested and works on all devices with keyboard and full JavaScript support in internet browser, or alternative pre-compiled JAVA V8 .jar file with webEngine and JavaFX and code in string.
ZIP Contains examples in TXT file.
More pictures and examples is here at Wiki. Wiki include ZIP with scan of original historical manuals in Slovak language from years 1987 - 1990
Today exist some variants (not mine) like: LightBot or Swift Playgrounds on tablets. ...