---
title: "QL Logo Implementation in SuperBASIC"
type: "article"
slug: "ql-logo-implementation-in-superbasic"
url: "http://localhost/article/ql-logo-implementation-in-superbasic/"
markdown_url: "http://localhost/article/ql-logo-implementation-in-superbasic.md"
published_at: "2026-03-15T00:48:29+00:00"
modified_at: "2026-03-15T00:48:29+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Implements a subset of Logo turtle graphics commands as SuperBASIC procedures for the Sinclair QL, including FD/BK (movement), RT/LT (turning), PU/PD (pen control), CIRCLEL/CIRCLER, SETPOS, DOT, SETX, SETY, SETH (heading), SETPC/SETBG (colors), CS (clear screen), and HOME. All loop and logical control uses SuperBASIC commands; the Logo procedures start at line 9000 so user programs…"
category:
  - name: "Timelinez"
    slug: "timelinez"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/timelinez/"
post_tag:
  - name: "LOGO (programming language)"
    slug: "logo"
    taxonomy: "post_tag"
    url: "http://localhost/tag/logo/"
  - name: "QL"
    slug: "ql"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ql/"
  - name: "Superbasic (programming language)"
    slug: "superbasic-programming-language"
    taxonomy: "post_tag"
    url: "http://localhost/tag/superbasic-programming-language/"
  - name: "Type-in program"
    slug: "type-in-program"
    taxonomy: "post_tag"
    url: "http://localhost/tag/type-in-program/"
model:
  - name: "Sinclair QL"
    slug: "sinclair-ql"
    taxonomy: "model"
    url: "http://localhost/model/sinclair-ql/"
indiv:
  - name: "Tim Swenson"
    slug: "tim-swenson"
    taxonomy: "indiv"
    url: "http://localhost/indiv/tim-swenson/"
publication_r:
  id: 21571
  title: "Timelinez"
  type: "periodical"
  url: "http://localhost/periodical/timelinez/"
authors_r:
  - name: "Tim Swenson"
    slug: "tim-swenson"
    taxonomy: "indiv"
    url: "http://localhost/indiv/tim-swenson/"
volume: "7"
issue: "2"
issues_articles:
  - id: 38867
    title: "Timelinez v7 n2"
    type: "issue"
    url: "http://localhost/issue/timelinez-v7-n2/"
pages: "4"
pubdate: "February 1989"
archive_link: false
---

Implements a subset of Logo turtle graphics commands as SuperBASIC procedures for the Sinclair QL, including FD/BK (movement), RT/LT (turning), PU/PD (pen control), CIRCLEL/CIRCLER, SETPOS, DOT, SETX, SETY, SETH (heading), SETPC/SETBG (colors), CS (clear screen), and HOME. All loop and logical control uses SuperBASIC commands; the Logo procedures start at line 9000 so user programs can use low line numbers. Includes a sample arrow program.