// Screen

SetFPS 60    // Set game speed to 60 frames per second
SCREEN_WIDTH =    GetScreenWidth()
SCREEN_HEIGHT = GetScreenHeight()

// Font

LoadFont "Arial", 1, 16, 0

// Starting Values

ballRadius = 5                        // radius of ball
x# = SCREEN_WIDTH  / 2            // horizontal position of ball
y# = SCREEN_HEIGHT / 2            // vertical position of ball
xSpeed# = RndRange#(-2,2)        // horizontal speed of ball
ySpeed# = RndRange#(-2,2)        // vertical speed of ball

// Main Loop

Do            // beginning of main loop

    // Game Logic

    // change speed / direction on Space Key

    If SpaceKey()
        xSpeed# = RndRange#(-4,4)
        ySpeed# = RndRange#(-4,4)
        FlushKeys
    EndIf

    // move ball
    x# = x# + xSpeed#
    y# = y# + ySpeed#

    // bounce
    If x# < 0 + ballRadius / 2 Then xSpeed# = xSpeed# * -1
    If x# >  SCREEN_WIDTH - ballRadius / 2 Then xSpeed# = xSpeed# * -1
    If y# < 0 + ballRadius / 2 Then ySpeed# = ySpeed# * -1
    If y# >  SCREEN_HEIGHT - ballRadius / 2 Then ySpeed# = ySpeed# * -1

    // Draw Graphics
    Cls 0                                // clear screen to black
        Print "Hit Space to change speed / direction of ball." 
        Circle x#,y#, 5, False    // draw circle
    Sync                                // display screen to player
Loop        // end if main loop