diff --git a/CHANGELOG.md b/CHANGELOG.md
index 26e0702..e4d59f7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,10 +3,10 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [0.20.0]
 ### Added
 * Integration with MESA
-* `not_agent_ids` paramter to get sql in history
+* `not_agent_ids` parameter to get sql in history
 ### Changed
 * `soil.Environment` now also inherits from `mesa.Model`
 * `soil.Agent` now also inherits from `mesa.Agent`
@@ -16,11 +16,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Removed
 * `simpy` dependency and compatibility. Each agent used to be a simpy generator, but that made debugging and error handling more complex. That has been replaced by a scheduler within the `soil.Environment` class, similar to how `mesa` does it.
 * `soil.history` is now a separate package named `tsih`. The keys namedtuple uses `dict_id` instead of `agent_id`.
-
 ### Added
 * An option to choose whether a database should be used for history 
-
-
 ## [0.15.2]
 ### Fixed
 * Pass the right known_modules and parameters to stats discovery in simulation
diff --git a/examples/random_delays/random_delays.py b/examples/random_delays/random_delays.py
new file mode 100644
index 0000000..257eb82
--- /dev/null
+++ b/examples/random_delays/random_delays.py
@@ -0,0 +1,31 @@
+'''
+Example of setting a 
+Example of a fully programmatic simulation, without definition files.
+'''
+from soil import Simulation, agents
+from soil.time import Delta
+from networkx import Graph
+from random import expovariate
+import logging
+
+
+
+class MyAgent(agents.FSM):
+
+    @agents.default_state
+    @agents.state
+    def neutral(self):
+        self.info('I am running')
+        return None, Delta(expovariate(1/16))
+
+s = Simulation(name='Programmatic',
+               network_agents=[{'agent_type': MyAgent, 'id': 0}],
+               topology={'nodes': [{'id': 0}], 'links': []},
+               num_trials=1,
+               max_time=100,
+               agent_type=MyAgent,
+               dry_run=True)
+
+
+logging.basicConfig(level=logging.INFO)
+envs = s.run()