Scroll down to check out how to use these interactive templates that are designed to help you learn the vocabulary associated with any given concept ( in this case in Japanese ) .
Look for the rectangular box on the curve.
Click and drag it along the curve
Notice the words that are coming in from the side then landing on the line.
Stop there. Click on the word.
This is the Japanese equivalent.  Written in 'Romaji' - ( Roman Letters ) .
Try to memorise this word.
Click on it again.
This is how native speakers of Japanese would see this word - using Kanji and Hiragana.
Now click again . Let's see if you can recall what that word was again.
If you can write it , it'll be added to the curve - so you can go back to review it.
If you can't remember it, just click twice anywhere on the screen and the dialogue box will disappear and you can either try again or move on to the next words.
Keep going  to make all the words along the curve visible.
The words along the curve are describing  states as they increase and decrease over time - usually they're adjectives or nouns.
By default , these templates open in the States Mode.
Notice the 'toggle' button down at the bottom.
This takes you to the Transitions Mode where you'll see the same curve
-but with some words sitting on top of the  line of the curve.
These are the verbs, and adverbial phrases that are used to describe the transitions that occur between the states that you saw in the States Mode.  
Click and drag them - like a roller coaster - along the line and over to the other side and back. Notice that the words are changing depending on where they are on the curve.
Notice also that if you click on them, the Japanese Romaji version comes up.
Then click again and the real Japanese version appears. 
Clicking again brings up the dialogue box where , if you can reproduce the word that you saw in the Romaji version, it will be sent up to the array at either the top left or the top right of the screen. 
You can click on the words to turn them on or off .
Have a play around and see how many new words you can remember.
N.B. In this version you're seeing your own 'source' language by default - and you need to click to display the 'target' language.  In 'real' versions, you'll be seeing the target language first to encourage you to guess at the meaning of the word judging by its position in relation to where it is on the curve.