Code Sketch

cleari()

setSpeed(medium)
setPenColor(mlight)
setBackground(mlight)
setFillColor(bkgrnd)

def septagon
{forward(50)
 right(51.428)
 forward(50)
 right(51.428)
 forward(50)
 right(51.428)
 forward(50)
 right(51.428)
 forward(50)
 right(51.428)
 forward(50)
 right(51.428)
 forward(50)
 right(51.428)
}
repeat(8) 
{
 right(45)
 septagon   
}

//code to def sky and ground
def bkgrnd=cm.linearGradient(60, 120, black, 100, 45, red, false)

def mlight=cm.linearGradient(60, 120, red, 100, 45, black, false)