diff --git a/ECTrainer2/ECTrainerGUI.cpp b/ECTrainer2/ECTrainerGUI.cpp
index 0414528..19aacc4 100644
--- a/ECTrainer2/ECTrainerGUI.cpp
+++ b/ECTrainer2/ECTrainerGUI.cpp
@@ -1,6 +1,9 @@
 
 #include "ECTrainer.h"
 #include "ECTrainerGUI.h"
+#include <mmsystem.h>
+#pragma comment(lib,"winmm.lib")
+#include <time.h>
 
 #define CVUI_IMPLEMENTATION
 #include "cvui.h"
@@ -55,7 +58,10 @@
 
 	bool fShowEyesPos = true;
 	bool fStimulus = false;
-	float targetSize = 1.0;
+	bool fContact = false;
+	bool fKeepContact = false;
+	float targetSize = 2.0;
+	clock_t startContact = 0;
 
 	while (_pEct->IsRunning() && cv::getWindowProperty(WIN_MAIN, 0) >= 0) {
 
@@ -78,33 +84,83 @@
 		}
 
 		// �h���摜
-		float dist;
 		if (_pEct->GetGazeI().x >= 0) {
 			cv::circle(_DispImage,
 				cv::Point((int)(_DispImage.cols * _pEct->GetGazeI().x), (int)(_DispImage.rows * _pEct->GetGazeI().y)),
-				(int)(_DispImage.rows * 0.03), CV_RGB(0, 0, 255), 1);
+				(int)(_DispImage.rows * 0.03), CV_RGB(0, 0, 255), 2);
 		}
-		if (fStimulus && fShowEyesPos) {
-			cv::circle(_DispImage,
-				cv::Point((int)(_DispImage.cols * _pEct->GetEyeR().x), (int)(_DispImage.rows * _pEct->GetEyeR().y)),
-				(int)(_DispImage.rows * 0.03), CV_RGB(0, 128, 0), 1);
-			cv::circle(_DispImage,
-				cv::Point((int)(_DispImage.cols * _pEct->GetEyeL().x), (int)(_DispImage.rows * _pEct->GetEyeL().y)),
-				(int)(_DispImage.rows * 0.03), CV_RGB(0, 128, 0), 1);
+		fContact = false;
+		if (fStimulus) {
+			float dx = _pEct->GetEyeR().x - _pEct->GetEyeL().x;
+			float dy = _pEct->GetEyeR().y - _pEct->GetEyeL().y;
+			float eyesDistance = sqrtf(dx * dx + dy * dy);
+			float areaSize = eyesDistance * targetSize / 2.0F;
+			if (fShowEyesPos) {
+				cv::circle(_DispImage,
+					cv::Point((int)(_DispImage.cols * _pEct->GetEyeR().x), (int)(_DispImage.rows * _pEct->GetEyeR().y)),
+					(int)(_DispImage.rows * 0.03), CV_RGB(0, 128, 0), 2);
+				cv::circle(_DispImage,
+					cv::Point((int)(_DispImage.cols * _pEct->GetEyeL().x), (int)(_DispImage.rows * _pEct->GetEyeL().y)),
+					(int)(_DispImage.rows * 0.03), CV_RGB(0, 128, 0), 2);
+				cv::circle(_DispImage,
+					cv::Point((int)(_DispImage.cols * _pEct->GetEyeR().x), (int)(_DispImage.rows * _pEct->GetEyeR().y)),
+					(int)(_DispImage.cols * areaSize), CV_RGB(200, 200, 0), 2);
+				cv::circle(_DispImage,
+					cv::Point((int)(_DispImage.cols * _pEct->GetEyeL().x), (int)(_DispImage.rows * _pEct->GetEyeL().y)),
+					(int)(_DispImage.cols * areaSize), CV_RGB(200, 200, 0), 2);
+			}
+			if (_pEct->GetGazeI().x >= 0) {
+				float dxR = _pEct->GetEyeR().x - _pEct->GetGazeI().x;
+				float dyR = _pEct->GetEyeR().y - _pEct->GetGazeI().y;
+				float edR = sqrtf(dxR * dxR + dyR * dyR);
+				float dxL = _pEct->GetEyeL().x - _pEct->GetGazeI().x;
+				float dyL = _pEct->GetEyeL().y - _pEct->GetGazeI().y;
+				float edL = sqrtf(dxL * dxL + dyL * dyL);
+				if (edR <= areaSize || edL <= areaSize) {
+					fContact = true;
+				}
+			}
+		}
+
+		// �R���^�N�g����
+		if (fContact) {
+			if (!fKeepContact) {
+				fKeepContact = true;
+				startContact = clock();
+				PlaySound(_T("../voices/voice2.wav"), NULL, SND_FILENAME | SND_ASYNC);
+			} else {
+				if ((clock() - startContact) / CLOCKS_PER_SEC >= 3) {
+					PlaySound(_T("../voices/voice1.wav"), NULL, SND_FILENAME | SND_SYNC);
+					fKeepContact = false;
+					targetSize -= 0.2;
+					_pEct->Next();
+				}
+			}
+		} else {
+			fKeepContact = false;
 		}
 
 		// UI�`��
 		cvui::image(_MainFrame, 0, 0, _Logo);
 		cvui::beginColumn(_MainFrame, 10, 100, 140, -1, 10);
 		if (fStimulus) {
-			if (cvui::button(140, 30, "STOP")) fStimulus = false;
-			if (cvui::button(140, 30, "NEXT")) _pEct->Next();
+			if (cvui::button(140, 30, "STOP")) {
+				fKeepContact = false;
+				fStimulus = false;
+			}
+			if (cvui::button(140, 30, "NEXT")) {
+				fKeepContact = false;
+				_pEct->Next();
+			}
 			cvui::trackbar(140, &targetSize, (float)0, (float)3.0);
 			cvui::checkbox("Show Eyes", &fShowEyesPos);
+			cvui::text(fContact ? "Eyes Contact!" : "No contact");
 		} else {
 			if (cvui::button(140, 30, "CALIBRATION")) _pEct->Calib();
 			if (cvui::button(140, 30, "START")) {
-				_pEct->Start(); fStimulus = true;
+				fStimulus = true;
+				fKeepContact = false;
+				_pEct->Start();
 			}
 		}
 		cvui::printf("Mouse W %d, %d", mp.x, mp.y);