Графика (двигать квадратик по фону)

#include <conio.h>
#include <windows.h>
 
TCHAR title[MAX_PATH];
 
void Kartinka(HDC hdc,int x1,int y1, int x2, int y2);
 
int main(int argc, char* argv[])
{
system("color f9");
GetConsoleTitle(title, MAX_PATH);
HWND hwnd = FindWindow(NULL, title);
HDC hdc = GetDC(hwnd);
RECT rect;
GetClientRect(hwnd, &rect);
 
HBRUSH hbrush = CreateSolidBrush(RGB(75, 220, 180)); 
HPEN hpen = CreatePen(PS_SOLID, 3, RGB(75,220, 180));
HPEN hpen1 = CreatePen(PS_SOLID, 3, RGB(75,220, 180));
HBRUSH hbrush1 = CreateSolidBrush(RGB(220, 120, 180));
int x1 = rect.left, x2 = rect.left + 50;
int y1 = rect.top, y2 =rect.top + 50;
int x3 = x1,x4 = x2,y4 = y2,y3 = y1;
SelectObject(hdc,hpen1);
SelectObject(hdc,hbrush1);
Rectangle(hdc,x1,y1,x2,y2);
 
while (1)
{
int k = getch();
if (k == 224)
k = getch();
switch(k)
{
case 27: 
DeleteObject(hbrush);
DeleteObject(hpen);
DeleteObject(hbrush1);
DeleteObject(hpen1);
ReleaseDC(hwnd, hdc);
return 0;
case 80:
y3+=9;
y4+=9;
break;
case 75:
x3-=9;
x4-=9;
break;
case 77:
x3+=9;
x4+=9;
break;
case 72:
y3-=9;
y4-=9;
break;
}
if (y3<rect.top)
{
y3+=9;
y4+=9;
}
else if (y4> rect.bottom)
{ 
y4-=9;
y3-=9;
}
else if(x3 < rect.left)
{
x3+=9;
x4+=9;
}
else if(x4 > rect.right)
{
x3-=9;
x4-=9;
} 
SelectObject(hdc, hbrush);
SelectObject(hdc,hpen);
Rectangle(hdc, x1, y1,x2,y2);
SelectObject(hdc,hpen1);
SelectObject(hdc,hbrush1);
Rectangle(hdc,x3,y3,x4,y4);
x1=x3;x2=x4;y1=y3;y2=y4;
 
}
 
}

HBRUSH hbrush = CreateSolidBrush(RGB(255, 255, 255)); 
HPEN hpen = CreatePen(PS_SOLID, 3, RGB(255,255, 255));
HPEN hpen1 = CreatePen(PS_SOLID, 3, RGB(75,250, 250));
HBRUSH hbrush1 = CreateSolidBrush(RGB(255, 255, 255));