The "orbit" sketch from ruby-processing, ported to work with Visor.

orbit.rb

# Ported from http://nodebox.net/code/index.php/Graphics_State

# This sketch demonstrates how to use the frame rate as orbital state,
# as well as how to use system fonts in Ruby-Processing.
attr_reader :d_font

smooth
@d_font = create_font('Helvetica', 40, false, ('a'..'z').to_a)
# Note: Colors inverted from original to ease layer blending.
stroke 255
fill 255

def draw
  background 0
  translate 225, 225
  text_font d_font
  ellipse 0, 0, 10, 10
  text 'sun', 10, 0
  3.times do |i|
    push_matrix
    rotate frame_count / -180.0 * PI + i * PI / -1.5
    line 0, 0, 120, 0
    translate 120, 0
    ellipse 0, 0, 10, 10
    text_font d_font, 22
    text 'planet', 10, 0
    rotate frame_count / -30.0 * PI
    line 0, 0, 30, 0
    text_font d_font, 15
    text 'moon', 32, 0
    pop_matrix
  end
end

# The MIT License (MIT)
# 
# Copyright (c) 2019 Jay McGavren
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.