// Initialize display
SetVirtualResolution    (800,600)
SetClearColor           (0,0,0)
SetOrientationAllowed   (0,0,1,1)
SetResolutionMode       (2)
SetSyncRate             (60,1)
SetBorderColor          (200,200,200)

Global a#
Global x1#
Global x2#
Global x3#
Global x4#
Global ang#=0
Global amp=7

global Pos1=175
global Pos2=375

// Initialize "bitmap"
global dim pixel[359,299]
for l1=0 to 359
    for l2=0 to 299
        pixel[l1,l2]=createsprite(void)
        setspritesize(pixel[l1,l2],1,-1)
        setspriteposition(pixel[l1,l2],l1,l2)
        setspritecolor(pixel[l1,l2],random(0,150),random(0,150),random(0,150),255)
    next l2
next l1
// Display help
print("Press Q to exit program")
print("Press C to clear screen")
sync()

sleep(1000)


// Main loop (Press Q to exit, C to clear screed)
do
    For a=1 To 600 Step 2
			x1=((Sin((a/amp)+ang))*100)+300
			x2=((Sin((a/amp)+ang+90))*100)+300
			x3=((Sin((a/amp)+ang+90*2))*100)+300
			x4=((Sin((a/amp)+ang+90*3))*100)+300


			If x1<x2
			   drawline (x1-Pos1,a,x2-Pos1,a,255,0,255)

  			   drawline (x1+Pos2,a,x2+Pos2,a,255,0,255)
			EndIf

			If x2<x3
			   drawline (x2-Pos1,a,x3-Pos1,a,0,0,255)

			   drawline (x2+Pos2,a,x3+Pos2,a,0,0,255)
   			EndIf


			If x3<x4
			   drawline (x3-Pos1,a,x4-Pos1,a,0,255,0)

			   drawline(x3+Pos2,a,x4+Pos2,a,0,255,0)
			EndIf


			If x4<x1
			   drawline(x4-Pos1,a,x1-Pos1,a,255,255,0)

			   drawline(x4+pos2,a,x1+pos2,a,255,255,0)
			EndIf
    Next

	ang=ang+2
    If ang=360 Then ang=0


    // Check for input
    if getrawkeypressed(67) then cls(0,0,0)
    if getrawkeypressed(81) then exit
    sync()
loop
// Safe exit in case of loop exit
end

function cls(r,g,b)
    for l1=0 to 359
        for l2=0 to 299
            plot(l1,l2,r,g,b)
        next l2
    next l1
endfunction

function plot(x,y,r,g,b)
    if x<0 or x>359 or y<0 or y>299 then return
    setspritecolor(pixel[x,y],r,g,b,255)
endfunction

function drawline(x1,y1,x2,y2,r,g,b)
    dx=abs(x2-x1)
    dy=abs(y2-y1)
    if x1<x2 then sx=1 else sx=-1
    if y1<y2 then sy=1 else sy=-1
    err=dx-dy
    do
        plot(x1,y1,r,g,b)
        if x1=x2 and y1=y2 then exit
        e2=2*err
        if e2>-dy
            err=err-dy
            x1=x1+sx
        endif
        if e2<dx
            err=err+dx
            y1=y1+sy
        endif
    loop
endfunction

// Initialize display
SetVirtualResolution    (800,600)
SetClearColor           (0,0,0)
SetOrientationAllowed   (0,0,1,1)
SetResolutionMode       (2)
SetSyncRate             (60,1)
SetBorderColor          (200,200,200)

Global a#
Global x1#
Global x2#
Global x3#
Global x4#
Global ang#=0
Global amp=7

global Pos1=175
global Pos2=375

// Display help
print("Press Q to exit program")
sync()
sleep(1000)

// Main loop (Press Q to exit)
do
    For a=1 To 600 Step 2
			x1=((Sin((a/amp)+ang))*100)+300
			x2=((Sin((a/amp)+ang+90))*100)+300
			x3=((Sin((a/amp)+ang+90*2))*100)+300
			x4=((Sin((a/amp)+ang+90*3))*100)+300

			If x1<x2
			   drawline (a,x1-Pos1,a,x2-Pos1,a,255,0,255)
  			   drawline (a+1000,x1+Pos2,a,x2+Pos2,a,255,0,255)
			EndIf

			If x2<x3
			   drawline (a,x2-Pos1,a,x3-Pos1,a,0,0,255)
			   drawline (a+1000,x2+Pos2,a,x3+Pos2,a,0,0,255)
   			EndIf

			If x3<x4
			   drawline (a,x3-Pos1,a,x4-Pos1,a,0,255,0)
			   drawline (a+1000,x3+Pos2,a,x4+Pos2,a,0,255,0)
			EndIf

			If x4<x1
			   drawline (a,x4-Pos1,a,x1-Pos1,a,255,255,0)
			   drawline (a+1000,x4+pos2,a,x1+pos2,a,255,255,0)
			EndIf
    Next

	ang=ang+2
    If ang>360 Then ang=ang-360

    // Check for input
    if getrawkeypressed(81) then exit
    sync()
loop
// Safe exit in case of loop exit
end

function drawline(id,x1,y1,x2,y2,r,g,b)
    // Create the line sprite
    if getspriteexists(id)=0 then createsprite(id,0)
    a=atan((x2-x1)/(y2-y1))
    if x1=<x2
        sx=x1
    else
        sx=x2
    endif
    if y1=<y2
        sy=y1
    else
        sy=y2
    endif
    w=sqrt((x2-x1)^2+(y2-y1)^2)
    setspritesize(id,w,2)
    setspriteangle(id,a+10)
    setspriteoffset(id,0,0)
    setspritepositionbyoffset(id,sx,sy)
    setspritecolor(id,r,g,b,255)
endfunction

// Initialize display
SetVirtualResolution    (800,600)
SetClearColor           (0,0,0)
SetOrientationAllowed   (0,0,1,1)
SetResolutionMode       (2)
SetSyncRate             (60,1)
SetBorderColor          (200,200,200)

ang#=0.0
amp#=7.0
Pos1=100
Pos2=700
r=255
g=0
b=255
// Display help
print("Press Q to exit program")
sync()
sleep(1000)

// Main loop (Press Q to exit)
do
    t=t+1
    if t=100
        t=0
        r=random(100,255)
        g=random(100,255)
        b=random(100,255)
    endif
    For a=1 To 640 Step 1
        x1#=((Sin((a/amp#)+ang#))*100)
	x2#=((Sin((a/amp#)+ang#+90))*100)
	x3#=((Sin((a/amp#)+ang#+180))*100)
	x4#=((Sin((a/amp#)+ang#+270))*100)

	drawline (a,x1#+Pos1,a-40,x2#+Pos1,a-40,r,g,b)
   	drawline (a+1000,x3#+Pos2,a-40,x4#+Pos2,a-40,r,g,b)
    Next

    ang#=ang#+2
    If ang#>360 Then ang#=ang#-360

    // Check for input
    if getrawkeypressed(81) then exit
    sync()
loop
// Safe exit in case of loop exit
end

function drawline(id,x1,y1,x2,y2,r,g,b)
    // Create the line sprite
    if getspriteexists(id)=0 then createsprite(id,0)
    a=atan((x2-x1)/(y2-y1))
    if x1=<x2
        sx=x1
    else
        sx=x2
    endif
    if y1=<y2
        sy=y1
    else
        sy=y2
    endif
    w=sqrt((x2-x1)^2+(y2-y1)^2)
    setspritesize(id,w,2)
    setspriteangle(id,a+10)
    setspriteoffset(id,0,0)
    setspritepositionbyoffset(id,sx,sy)
    setspritecolor(id,r,g,b,255)
endfunction