How do I tell R to fill the circle dots with colour on a scatter plot?

Question

I want to fill the solid circle dots on my scatterplot with colour. I have tried this:

>  plot(dframe1$TV~dframe1$Books)
>  xlab="Number of books read per month"
>  plot(dframe1$TV~dframe1$Books,
          xlab="Number of books read per month")
> plot(dframe1$TV~dframe1$Books,
         xlab="Number of books read per month",
         ylab="Hours of TV watched per week",
         main="Associations between time spent watching TV and reading",
         col.main="red",
         cex=1.5,
         pch=21,
         bg=”light green”)
 Error: unexpected input in:
"pch=21,bg=”"

It does not work. I would appreciate advice/help. :)

Answer 1

Color name is without spaces, try "lightgreen" instead

Example

set.seed(1) # some random data
x <- rnorm(20, 5)
y <- 2 + .78*x + rnorm(20)
plot(y~x, pch=21,  bg="lightgreen")

which produces: