---
title: "QL Chaos Program"
type: "article"
slug: "ql-chaos-program"
url: "http://localhost/article/ql-chaos-program/"
markdown_url: "http://localhost/article/ql-chaos-program.md"
published_at: "2026-03-15T00:43:08+00:00"
modified_at: "2026-03-15T00:43:08+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "SuperBASIC program implementing the logistic map chaotic attractor for the Sinclair QL. Uses WINDOW, FOR/NEXT loops, and POINT commands to visualize the behavior of x = rx(1-x) across parameter values r = 2.978 to 4. The program contains a deliberate or accidental bug; readers are invited to find and correct it. A second shorter variant…"
category:
  - name: "Timelinez"
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post_tag:
  - name: "QL"
    slug: "ql"
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  - name: "Superbasic (programming language)"
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  - name: "Type-in program"
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model:
  - name: "Sinclair QL"
    slug: "sinclair-ql"
    taxonomy: "model"
    url: "http://localhost/model/sinclair-ql/"
indiv:
  - name: "Andy Hradesky"
    slug: "andy-hradesky"
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publication_r:
  id: 21571
  title: "Timelinez"
  type: "periodical"
  url: "http://localhost/periodical/timelinez/"
authors_r:
  - name: "Andy Hradesky"
    slug: "andy-hradesky"
    taxonomy: "indiv"
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volume: "7"
issue: "4"
issues_articles:
  - id: 38869
    title: "Timelinez v7 n4"
    type: "issue"
    url: "http://localhost/issue/timelinez-v7-n4/"
pages: "12"
pubdate: "April 1989"
archive_link: false
---

# QL Chaos Program

SuperBASIC program implementing the logistic map chaotic attractor for the Sinclair QL. Uses WINDOW, FOR/NEXT loops, and POINT commands to visualize the behavior of x = rx(1-x) across parameter values r = 2.978 to 4. The program contains a deliberate or accidental bug; readers are invited to find and correct it. A second shorter variant using POINT at different coordinates is also provided.