diff --git a/Lab4/Lab4-1.cpp b/Lab4/Lab4-1.cpp
new file mode 100644
index 0000000..0a01580
--- /dev/null
+++ b/Lab4/Lab4-1.cpp
@@ -0,0 +1,164 @@
+#include <conio.h>
+#include <dos.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+#define LEFT_ARROW 'K'
+#define RIGHT_ARROW 'M'
+#define ESC 27
+
+const int x1 = 10;
+const int y1 = 10;
+const int x2 = 70;
+const int y2 = 20;
+
+class Slider
+{
+private:
+	int x, y;
+public:
+	Slider();
+	void moveLeft();
+	void moveRight();
+	int getX();
+	int getY();
+} slider;
+
+int Slider::getX()
+{
+	return x;
+}
+
+int Slider::getY()
+{
+	return y;
+}
+
+Slider::Slider()
+{
+	x = 0;
+	y = 0;
+}
+
+void Slider::moveLeft()
+{
+	if(x>0)
+		x--;
+	else if(y>0)
+	{
+		x = 59;
+		y--;
+	}
+}
+
+void Slider::moveRight()
+{
+	if((y < 10 && x < 60) || (y == 10 && x < 59))
+		x++;
+	else if(y<10)
+	{
+		x = 0;
+		y++;
+	}
+}
+
+class Scene
+{
+private:
+	int width, height;
+	char* screen;
+public:
+	Scene(int, int, int, int);
+	void render(Slider);
+} scene = Scene(x1,y1,x2,y2);
+
+Scene::Scene(int x1, int y1, int x2, int y2)
+{
+	width = x2 - x1 + 1;
+	height = y2 - y1 + 1;
+	screen = new char[width * height];
+	screen[width * height - 1] = '\0';
+}
+
+void Scene::render(Slider slider)
+{
+	clrscr();
+	for(int i = 0; i < width; i++)
+		for(int j = 0; j < height; j++)
+		{
+			char texel = ' ';
+			if(slider.getX() == i && slider.getY() == j)
+				texel = '*';
+			screen[i + j * width] = texel;
+		}
+		screen[width * height - 1] = '\0';
+	cprintf(screen);
+}
+
+enum Side
+{
+LEFT, RIGHT, HOLD
+};
+
+void outputGreeting()
+{
+	printf("Program allows to move character using left and right arrows.\n");
+	printf("Motion is permanent.\n");
+	printf("Use ESC button to stop program.\n");
+}
+
+void goToNextLine()
+{
+	cprintf("\r\n");
+}
+
+void loop()
+{
+	int lastKey;
+	int state = 1;
+	Side side = HOLD;
+	while(state)
+	{
+		delay(30);
+		if(kbhit())
+		switch(getch())
+		{
+			case RIGHT_ARROW:
+				side = RIGHT;
+			break;
+			case LEFT_ARROW:
+				side = LEFT;
+			break;
+			case ESC:
+				state = 0;
+			break;
+		}
+		switch(side)
+		{
+			case RIGHT:
+				slider.moveRight();
+			break;
+			case LEFT:
+				slider.moveLeft();
+			break;
+		}
+		scene.render(slider);
+	}
+}
+
+void main()
+{
+	clrscr();
+	outputGreeting();
+	system("PAUSE");
+
+	window(x1,y1,x2,y2);
+	scene.render(slider);
+
+	loop();
+
+	goToNextLine();
+	system("PAUSE");
+	clrscr();
+}
diff --git a/Lab4/Lab4-2.cpp b/Lab4/Lab4-2.cpp
new file mode 100644
index 0000000..013294d
--- /dev/null
+++ b/Lab4/Lab4-2.cpp
@@ -0,0 +1,175 @@
+#include <conio.h>
+#include <dos.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <bios.h>
+
+
+#define LEFT_ARROW 75
+#define RIGHT_ARROW 77
+#define ESC 27
+
+const int x1 = 10;
+const int y1 = 10;
+const int x2 = 70;
+const int y2 = 20;
+
+class Slider
+{
+private:
+	int x, y;
+public:
+	Slider();
+	void moveLeft();
+	void moveRight();
+	int getX();
+	int getY();
+} slider;
+
+int Slider::getX()
+{
+	return x;
+}
+
+int Slider::getY()
+{
+	return y;
+}
+
+Slider::Slider()
+{
+	x = 0;
+	y = 0;
+}
+
+void Slider::moveLeft()
+{
+	if(x>0)
+		x--;
+	else if(y>0)
+	{
+		x = 59;
+		y--;
+	}
+}
+
+void Slider::moveRight()
+{
+	if((y < 10 && x < 60) || (y == 10 && x < 59))
+		x++;
+	else if(y<10)
+	{
+		x = 0;
+		y++;
+	}
+}
+
+class Scene
+{
+private:
+	int width, height;
+	char* screen;
+public:
+	Scene(int, int, int, int);
+	void render(Slider);
+} scene = Scene(x1,y1,x2,y2);
+
+Scene::Scene(int x1, int y1, int x2, int y2)
+{
+	width = x2 - x1 + 1;
+	height = y2 - y1 + 1;
+	screen = new char[width * height];
+	screen[width * height - 1] = '\0';
+}
+
+void Scene::render(Slider slider)
+{
+	clrscr();
+	for(int i = 0; i < width; i++)
+		for(int j = 0; j < height; j++)
+		{
+			char texel = ' ';
+			if(slider.getX() == i && slider.getY() == j)
+				texel = '*';
+			screen[i + j * width] = texel;
+		}
+		screen[width * height - 1] = '\0';
+	cprintf(screen);
+}
+
+enum Side
+{
+LEFT, RIGHT, HOLD
+};
+
+void outputGreeting()
+{
+	printf("Program allows to move character using left and right arrows.\n");
+	printf("Motion is permanent.\n");
+	printf("Use ESC button to stop program.\n");
+}
+
+void goToNextLine()
+{
+	cprintf("\r\n");
+}
+
+char getKey()
+{
+	union REGS r;
+	r.h.ah = 0x6;
+	r.h.dl = 0xff;
+	int86(0x21,&r,&r);
+	return r.h.al;
+}
+
+void loop()
+{
+	int state = 1;
+	Side side = HOLD;
+	char lastKey;
+
+	while(state)
+	{
+		delay(30);
+		lastKey = getKey();
+		switch(lastKey)
+		{
+			case RIGHT_ARROW:
+				side = RIGHT;
+			break;
+			case LEFT_ARROW:
+				side = LEFT;
+			break;
+			case ESC:
+				state = 0;
+			break;
+		}
+		switch(side)
+		{
+			case RIGHT:
+				slider.moveRight();
+			break;
+			case LEFT:
+				slider.moveLeft();
+			break;
+		}
+		scene.render(slider);
+	}
+}
+
+void main()
+{
+	clrscr();
+	outputGreeting();
+	system("PAUSE");
+
+	window(x1,y1,x2,y2);
+	scene.render(slider);
+
+	loop();
+
+	goToNextLine();
+	system("PAUSE");
+	clrscr();
+}