Imports github.com/mrmxf/opentsg-core/colour github.com/mrmxf/opentsg-core/colourgen github.com/mrmxf/opentsg-core/config github.com/mrmxf/opentsg-core/errHandle github.com/mrmxf/opentsg-core/gridgen github.com/mrmxf/opentsg-core/widgethandler Standard library imports context fmt image image/color image/draw sync