手写笔如何实现循环?

stylus how to implement a loop?

美好的一天。有一个对象 class 名称和图标的路径。

currentProject = {'current-project': '../../sprites/123.png',
                  'composition-project': '../../sprites/123.png',
                  'room': '../../sprites/123.png',
                  'terms': '../../sprites/123.png',
                  'documents': '../../sprites/123.png',
                  'command': '../../sprites/123.png',
                  'contact': '../../sprites/123.png'}


如何得到结果?

 &__current-project: 
    background-image: url('../../sprites/123.png')
 &__room 
    background-image: url('../../sprites/123.png')

在手写笔中使用迭代语法 for [ ] in

currentProject = {'current-project': '../../sprites/123.png',
                  'composition-project': '../../sprites/123.png',
                  'room': '../../sprites/123.png',
                  'terms': '../../sprites/123.png',
                  'documents': '../../sprites/123.png',
                  'command': '../../sprites/123.png',
                  'contact': '../../sprites/123.png'}

div                 
  for k, v in currentProject
    &_{k}
      background-image v

输出应该是

div_current-project {
  background-image: '../../sprites/123.png';
}
...