diff --git a/gec22_demo/exp_idea.png b/gec22_demo/exp_idea.png
new file mode 100644
index 0000000..eead693
Binary files /dev/null and b/gec22_demo/exp_idea.png differ
diff --git a/gec22_demo/exp_step1.png b/gec22_demo/exp_step1.png
new file mode 100644
index 0000000..05540aa
Binary files /dev/null and b/gec22_demo/exp_step1.png differ
diff --git a/gec22_demo/exp_step2.png b/gec22_demo/exp_step2.png
new file mode 100644
index 0000000..033e4b1
Binary files /dev/null and b/gec22_demo/exp_step2.png differ
diff --git a/gec22_demo/exp_step3.png b/gec22_demo/exp_step3.png
new file mode 100644
index 0000000..bce7634
Binary files /dev/null and b/gec22_demo/exp_step3.png differ