tryscrollParser
 extends scrollParagraphParser
 description Try scroll program in iframe
 example
  tryscroll
   theme gazette
    code
     two = 1 + 1
 atoms cueAtom
 programParser
  description Anything here will be URI encoded and inserted into iframe src.
  cueFromId
  atoms cueAtom
  catchAllParser programLinkParser
  javascript
   get encoded() {
    return encodeURIComponent(this.subparticlesToString())
   }
 cueFromId
 javascript
  tag = "iframe"
  get link() {
   const baseLink = "https://try.scroll.pub/#"
   if (this.has("program")) {
     return baseLink + this.getParticle("program").encoded
    }
   return baseLink
  }
  get htmlAttributes() {
   const attrs = `src="${this.link}" style="width: 100%; height: 300px;"`
   return attrs
  }