Algorithm 3 The interaction mechanism of the proposed system
Input:
(1) a blank space on the touch screen with three buttons of the functions of “select,” “send,” and “remove”;
(2) a sequence of 512 brain wave samples every second in the forms of attention and meditation signals provided by the brain wave machine;
(3) a digital copybook of calligraphy with a sequence of sets of characters.
Output:
(1) a series of animations which are played on the panel of the interaction pool to reflect the emotions of the writer every 5 s;
(2) the same as (1) above but additionally with the calligraphic work being superimposed on the animation in a floating manner as shown in Figure 5d when the calligraphic work is sent out by pushing the button of ‘send’;
(3) a completely calligraphic work with a red seal and a color-palette background (created dynamically every 20 s) as shown in Figure 5c which is sent to show on the display screen as shown in Figure 4b when a writing session is ended by pushing the stamp on the touch screen to create the red seal;
(4) the same as that of (3) above but sent instead to the server of the proposed system.
Steps.
Step 1:	//Starting a new writing session
1.1 if the signal of “select” is detected, then
show the next set of characters in the digital copybook of calligraphy
//Allowing the writer to choose a desired set of characters
end if;
1.2 show the result of character-set selection on the touch screen.
Step 2:	//Looping while calligraphy is in progress
while the signal of “seal” is not detected do:
2.1 allow the writer to use the pen brush to conduct calligraphy and show the calligraphic work on the touch screen;
2.2 for every 20 s do:
(a) for every 5 s do:
//Generating and plays animations
(i) perform Algorithm 2 with the brain wave samples as the input to generate an animation A
(ii) play A by projecting it onto the interaction pool to show the visual content and using the built-in speaker to play the associated sound;
end for;
(b) if the signal of ‘send’ is detected then
//Showing the written work on the interaction pool
(i) superimpose the current calligraphic work W0 in a floating manner in the currently-played animation A to create a new animation B;
(ii) play B by projecting it onto the interaction pool to show the visual content and using the built-in speaker to play the associated sound;
end if;
(c) perform Algorithm 1 with the brain wave samples as the input to create a color palette P;
(d) if the ‘seal’ signal is detected then
//Showing the work on the display screen at the remote site
(i) superimpose a red seal on the pre-set area on the left side of the current calligraphic work W0 to create a new work W1;
(ii) send W1 to the cloud server of the system to keep W1 there;
(iii)superimpose W1 on the color palette P to create a second new work W2;
(iv) send W2 to the display screen at the remote site to show;
end if;
end for;
end while.
Step 3:	//Ending or starting another writing session
if the signal of ‘remove’ is detected then
clear the completed calligraphic work on the touch screen and go to Step 1;
//Starting another writing session
else
if the signal of ‘turn off system’ is not detected then
go to Step 2;	//Keeping the writing session
else exit;	//Ending
end if;
end if.