Read this it explains the diet.
http://healthandlight.com/TheMasterCleanse.pdf
The idea is to break down waste during the day (the lemonade)
then get the waste ready to expel (the lax tea last thing at night)
then flush the waste out (SWF in the morning)
When you go to the toilet after the wash you expel the waste from the day and night before, then you start again with the drink...
So the quick answer is you start every day with the SWF then once you've gone to the toilet (about an hour after) you can start with the lemonade.
Good luck with the first day!