Graphics 800,600,32,2
SetBuffer BackBuffer()
HidePointer

SeedRnd MilliSecs()

Global rc1 = 255
Global rc2 = 255
Global rc3 = 0
Global bc1 = 255
Global bc2 = 0
Global bc3 = 0
Global lc1 = 0
Global lc2 = 255
Global lc3 = 0
Global tc1 = 0
Global tc2 = 0
Global tc3 = 255

Global x=400
Global y=300

Global xspeed = 1
Global yspeed = 1

Global xx=xspeed
Global yy=yspeed

Global balltimer = MilliSecs()
Global gametimer = MilliSecs()

Global ball1 = 255
Global ball2 = 255
Global ball3 = 255

Global score = 0

startgame()

While Not KeyHit(1)
Cls

	topborder()
	leftborder()
	bottomborder()
	rightborder()
	
	If KeyHit(205) Then changeright()
	If KeyHit(203) Then changeleft()
	If KeyHit(208) Then changebottom()
	If KeyHit(200) Then changetop()
		
	Color 255,255,255
	
	Text 0,0,"Time: "+score
	
	If MilliSecs()>gametimer+1000 Then 
		score=score+1
		gametimer=MilliSecs()
	End If
	
	If score = 20 Then
		xspeed=xspeed+1
		yspeed=yspeed+1
		score=score+1
	End If
	
	If score = 40 Then
		xspeed=xspeed+1
		yspeed=yspeed+1
		score=score+1
	End If
	
	If score = 60 Then wingame()

	balltime()
		
	Color ball1,ball2,ball3
	Rect x,y,20,20
	
	x=x+xx
	y=y+yy
	
	checkball()
	
Flip
Wend
End

; end game
Function endgame()
	For f=0 To 50
		Color ball1,ball2,ball3
		Rect Rnd(40)+x-10,Rnd(40)+y-10,4,4
		Flip
	Next
	Delay 500
	For f=0 To 600 Step 20
		Color 0,0,0
		Rect 0,f,800,10
		Flip
	Next
	For f=10 To 600 Step 20
		Color 0,0,0
		Rect 0,f,800,10
		Flip
	Next
	FlushKeys
	Cls
	Color 255,255,255
	Text 310,300,"Game Over"
	Text 310,320,"Your time was "+score+" seconds."
	Flip
	WaitKey
	End
End Function

;top
Function topborder()
	Color tc1,tc2,tc3
	Rect 0,0,800,30
End Function

;left
Function leftborder()
	Color lc1,lc2,lc3
	Rect 0,30,30,540
End Function

;bottom
Function bottomborder()
	Color bc1,bc2,bc3
	Rect 0,570,800,30
End Function

;right
Function rightborder()
	Color rc1,rc2,rc3
	Rect 770,30,30,540
End Function

;change right
Function changeright()
	If rc1=255 And rc2=0 And rc3=0 Then ;if red
		rc1=0:rc2=255:rc3=0 ;make green
		Else If	rc1=0 And rc2=255 And rc3=0 Then ;if green
			rc1=0:rc2=0:rc3=255 ;make blue
			Else If rc1=0 And rc2=0 And rc3=255 Then ;if blue
				rc1=255:rc2=255:rc3=0 ;make yellow
				Else If rc1=255 And rc2=255 And rc3=0 Then ;if yellow
					rc1=255:rc2=0:rc3=0 ;make red
	End If
End Function

;change left
Function changeleft()
	If lc1=255 And lc2=0 And lc3=0 Then ;if red
		lc1=0:lc2=255:lc3=0 ;make green
		Else If	lc1=0 And lc2=255 And lc3=0 Then ;if green
			lc1=0:lc2=0:lc3=255 ;make blue
			Else If lc1=0 And lc2=0 And lc3=255 Then ;if blue
				lc1=255:lc2=255:lc3=0 ;make yellow
				Else If lc1=255 And lc2=255 And lc3=0 Then ;if yellow
					lc1=255:lc2=0:lc3=0 ;make red
	End If
End Function

;change bottom
Function changebottom()
	If bc1=255 And bc2=0 And bc3=0 Then ;if red
		bc1=0:bc2=255:bc3=0 ;make green
		Else If	bc1=0 And bc2=255 And bc3=0 Then ;if green
			bc1=0:bc2=0:bc3=255 ;make blue
			Else If bc1=0 And bc2=0 And bc3=255 Then ;if blue
				bc1=255:bc2=255:bc3=0 ;make yellow
				Else If bc1=255 And bc2=255 And bc3=0 Then ;if yellow
					bc1=255:bc2=0:bc3=0 ;make red
	End If
End Function

;change top
Function changetop()
	If tc1=255 And tc2=0 And tc3=0 Then ;if red
		tc1=0:tc2=255:tc3=0 ;make green
		Else If	tc1=0 And tc2=255 And tc3=0 Then ;if green
			tc1=0:tc2=0:tc3=255 ;make blue
			Else If tc1=0 And tc2=0 And tc3=255 Then ;if blue
				tc1=255:tc2=255:tc3=0 ;make yellow
				Else If tc1=255 And tc2=255 And tc3=0 Then ;if yellow
					tc1=255:tc2=0:tc3=0 ;make red
	End If
End Function

;ball timer
Function balltime()
	If MilliSecs()>balltimer+1000 And x>200 And x<700 And y>200 And y<400 Then
		col=Int(Rnd(3)+1)
		Select col
			Case 1
			ball1 = 255
			ball2 = 0
			ball3 = 0
			Case 2
			ball1 = 0
			ball2 = 255
			ball3 = 0
			Case 3
			ball1 = 0
			ball2 = 0
			ball3 = 255
			Case 4
			ball1 = 255
			ball2 = 255
			ball3 = 0
		End Select
		balltimer=MilliSecs()
	End If
End Function

; check ball collision
Function checkball()

	;check top bounce
	If y<30 And tc1=ball1 And tc2=ball2 And tc3=ball3 Then
		yy=yspeed
		Else If y<30 Then
		endgame()
	End If
		
	;check right bounce
	If x>750 And rc1=ball1 And rc2=ball2 And rc3=ball3 Then
		xx=-xspeed
		Else If x>750 Then
		endgame()
	End If
	
	;check bottom bounce
	If y>550 And bc1=ball1 And bc2=ball2 And bc3=ball3 Then
		yy=-yspeed
		Else If y>550 Then
		endgame()
	End If
	
	;check left bounce
	If x<30 And lc1=ball1 And lc2=ball2 And lc3=ball3 Then
		xx=xspeed
		Else If x<30 Then
		endgame()
	End If
	
End Function

;start game
Function startgame()
FlushKeys
Cls
Color 255,255,255
Text 100,85,"S.T.I.N.K"
Text 100,115,"A variation on the Pong theme for the Wednesday Workshop #29."
Text 100,145,"As usual, a ball will bounce around the screen. As it does, it will change colour."
Text 100,160,"It will randomly pick from 4 colours, red, green, blue and yellow."
Text 100,190,"The walls are coloured in the same way. In order for the ball to bounce off of the"
Text 100,205,"walls, they need to be the same colour. the wall's colour can be changed using the"
Text 100,220,"relevant arrow key. They follow the above order of red, green, blue and yellow."
Text 100,250,"Try to last as long as is possible. Every 20 seconds, the game speed will increase"
Text 100,265,"and a second added to your time. Can you last a minute? ...I couldn't!"
Text 100,295,"Press H for a hint, or any other key to start the game."
Flip
WaitKey
	If KeyHit(35) Then
		Text 100,325,"Personally I found it easier to have all the walls coloured the same, and change"
		Text 100,340,"them all as required."
		Text 100,370,"Press any key to start."
		Flip
		FlushKeys
		WaitKey
	End If
End Function

;win game
Function wingame()
	For f=0 To 50
		Color 255,255,255
		Rect Rnd(40)+x-10,Rnd(40)+y-10,4,4
		Flip
	Next
	Delay 500
	For f=0 To 600 Step 20
		Color 0,0,0
		Rect 0,f,800,10
		Flip
	Next
	For f=10 To 600 Step 20
		Color 0,0,0
		Rect 0,f,800,10
		Flip
	Next
	FlushKeys
	Cls
	Color 255,255,255
	Text 310,300,"YOU LASTED A MINUTE !"
	Text 310,320,"Your time was "+score+" seconds."
	Flip
	WaitKey
	End
End Function