// constructor
protected MachineConfiguration() {
tools = new DrawingTool[6];
int i=0;
tools[i++]=new DrawingTool_Pen("Pen (black)",0);
tools[i++]=new DrawingTool_Pen("Pen (red)",1);
tools[i++]=new DrawingTool_Pen("Pen (green)",2);
tools[i++]=new DrawingTool_Pen("Pen (blue)",3);
tools[i++]=new DrawingTool_LED();
tools[i++]=new DrawingTool_Spraypaint();
VersionCheck();
}