Simple box using CraftML tags

index.xml

<craft name="box">
    <param name="width" type="int" default="30"/>
    <param name="length" type="int" default="30"/>
    <param name="height" type="int" default="30"/>
    
    <g>
        <stack>
            <content></content>
            <cube size="{{length}} {{width}} 3" t="translate(3,0,0)"/>
        </stack>
        
        <row spacing="{{length}}">
            <repeat n="2">
                <cube size="3 {{width}} {{height}}"/>
            </repeat>
        </row>
        
        <col spacing="{{width}}" t="translate(0,-3,0)">
            <repeat n="2">
                <cube size="{{length + 6}} 3 {{height}}"/>
            </repeat>
        </col>
    </g>

</craft>