Referenced from lesson Structures, Reactors, and Animations
Directions: Write a function called next-state-tick, which takes in a SunsetState and returns a SunsetState in which the new x-coordinate is 8 pixels larger than in the given SunsetState and the y-coordinate is 4 pixels smaller than in the given SunsetState.
Contract and Purpose Statement |
Every contract has three parts…
# _______________::_->_
# _______
Examples |
Write some examples, then circle and label what changes…
examples:
_________________ (_)is _
_________________ (_)is _
end
Definition |
Write the definition, giving variable names to all your input values…
fun _______________(_):
___
end
These materials were developed partly through support of the National Science Foundation,
(awards 1042210, 1535276, 1648684, and 1738598). 
Bootstrap:Reactive by Emma Youndtsmith, Emmanuel Schanzer, Kathi Fisler, Shriram Krishnamurthi, Joe Politz and Dorai Sitaram
is licensed under a
Creative Commons 4.0 Unported License.
Based on a work at www.BootstrapWorld.org.
Permissions beyond the scope of this license may be available by contacting
schanzer@BootstrapWorld.org.