From the FAQ: [How to render a HTML node conditionally](http://faq.elm-community.org/#how-does-one-render-an-html-node-conditionally)

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To partial apply a function use the invocation syntax:

```
(function initial_arg1 initial_arg2 ...)
```

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The documentation for Random suggests using system time for creating seeds but this is not available in the standard runtime and even if it was a Github comment suggests it doesn't sufficient spread itself across the bit space to give a good seed.

The recommended way is to use native Javascript's `Math.random` and pass it via a port.

```
 Math.random() * Math.pow(2,32)
```

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Elm doesn't have access to the system clock or even the initialisation time of the runtime.

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As of 0.17 *elm-reactor* cannot stub out ports that are required by the program it is running.

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The correct statement to extract a value from a `Random.Generator` is `Random.step`.