Learn Red - Fundamentals of Red

Questions

1. Rewrite download-rates in currency-rates-gui.red so that it accepts the code and date as parameters.
2. Print out the internal structure of a button object to the Red console. Notice that button has a window parent face.
3. You can code a button to close its window by using the quit or the unview word in its action facet. Try both out. Note that unview/all is used when there are multiple windows to close.
4. Create a window that displays square base faces with different colors, such as base yellow 25x25. Try out several of the layout commands. 
5. Make a window with a button and a checkbox. Change the state and text of the checkbox with a click on the button. After three clicks, disable that button (hint: use face/enabled? for that).
6. Make ...